diff --git a/CHANGELOG.md b/CHANGELOG.md
index 048933fb..26ce160d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,10 @@ and this project adheres to
 
 - 🥅(frontend) intercept 401 error on GET threads #1754
 
+## Changed
+
+- 🦺(frontend) check content type pdf on PdfBlock #1756
+
 ### Fixed
 
 - 🐛(frontend) fix tables deletion #1752
diff --git a/src/frontend/apps/e2e/__tests__/app-impress/doc-editor.spec.ts b/src/frontend/apps/e2e/__tests__/app-impress/doc-editor.spec.ts
index ef4936c9..612a82e7 100644
--- a/src/frontend/apps/e2e/__tests__/app-impress/doc-editor.spec.ts
+++ b/src/frontend/apps/e2e/__tests__/app-impress/doc-editor.spec.ts
@@ -960,13 +960,35 @@ test.describe('Doc Editor', () => {
   test('it embeds PDF', async ({ page, browserName }) => {
     await createDoc(page, 'doc-toolbar', browserName, 1);
 
+    await page.getByRole('button', { name: 'Share' }).click();
+    await updateShareLink(page, 'Public', 'Reading');
+
+    await page.getByRole('button', { name: 'Close the share modal' }).click();
+
     await openSuggestionMenu({ page });
     await page.getByText('Embed a PDF file').click();
 
-    const pdfBlock = page.locator('div[data-content-type="pdf"]').first();
+    const pdfBlock = page.locator('div[data-content-type="pdf"]').last();
 
     await expect(pdfBlock).toBeVisible();
 
+    // Try with invalid PDF first
+    await page.getByText(/Add (PDF|file)/).click();
+
+    await page.locator('[data-test="embed-tab"]').click();
+
+    await page
+      .locator('[data-test="embed-input"]')
+      .fill('https://example.test/test.test');
+
+    await page.locator('[data-test="embed-input-button"]').click();
+
+    await expect(page.getByText('Invalid or missing PDF file')).toBeVisible();
+
+    await openSuggestionMenu({ page });
+    await page.getByText('Embed a PDF file').click();
+
+    // Now with a valid PDF
     await page.getByText(/Add (PDF|file)/).click();
     const fileChooserPromise = page.waitForEvent('filechooser');
     const downloadPromise = page.waitForEvent('download');
@@ -991,7 +1013,7 @@ test.describe('Doc Editor', () => {
     await expect(pdfEmbed).toHaveAttribute('role', 'presentation');
 
     // Check download with original filename
-    await page.locator('.bn-block-content[data-content-type="pdf"]').click();
+    await pdfBlock.click();
     await page.locator('[data-test="downloadfile"]').click();
 
     const download = await downloadPromise;
diff --git a/src/frontend/apps/impress/src/features/docs/doc-editor/components/custom-blocks/PdfBlock.tsx b/src/frontend/apps/impress/src/features/docs/doc-editor/components/custom-blocks/PdfBlock.tsx
index 539eee69..1130d2b5 100644
--- a/src/frontend/apps/impress/src/features/docs/doc-editor/components/custom-blocks/PdfBlock.tsx
+++ b/src/frontend/apps/impress/src/features/docs/doc-editor/components/custom-blocks/PdfBlock.tsx
@@ -13,12 +13,13 @@ import {
   createReactBlockSpec,
 } from '@blocknote/react';
 import { TFunction } from 'i18next';
-import { useEffect } from 'react';
+import { useEffect, useState } from 'react';
 import { useTranslation } from 'react-i18next';
-import { createGlobalStyle } from 'styled-components';
+import { createGlobalStyle, css } from 'styled-components';
 
-import { Box, Icon } from '@/components';
+import { Box, Icon, Loading } from '@/components';
 
+import { ANALYZE_URL } from '../../conf';
 import { DocsBlockNoteEditor } from '../../types';
 
 const PDFBlockStyle = createGlobalStyle`
@@ -66,6 +67,9 @@ const PdfBlockComponent = ({
   const pdfUrl = block.props.url;
   const { i18n, t } = useTranslation();
   const lang = i18n.resolvedLanguage;
+  const [isPDFContent, setIsPDFContent] = useState<boolean | null>(null);
+  const [isPDFContentLoading, setIsPDFContentLoading] =
+    useState<boolean>(false);
 
   useEffect(() => {
     if (lang && locales[lang as keyof typeof locales]) {
@@ -82,9 +86,55 @@ const PdfBlockComponent = ({
     }
   }, [lang, t]);
 
+  useEffect(() => {
+    if (!pdfUrl || pdfUrl.includes(ANALYZE_URL)) {
+      return;
+    }
+
+    const validatePDFContent = async () => {
+      setIsPDFContentLoading(true);
+      try {
+        const response = await fetch(pdfUrl, {
+          credentials: 'include',
+        });
+        const contentType = response.headers.get('content-type');
+
+        if (response.ok && contentType?.includes('application/pdf')) {
+          setIsPDFContent(true);
+        } else {
+          setIsPDFContent(false);
+        }
+      } catch {
+        setIsPDFContent(false);
+      } finally {
+        setIsPDFContentLoading(false);
+      }
+    };
+
+    void validatePDFContent();
+  }, [pdfUrl]);
+
   return (
     <Box ref={contentRef} className="bn-file-block-content-wrapper">
       <PDFBlockStyle />
+      {isPDFContentLoading && <Loading />}
+      {!isPDFContentLoading && isPDFContent !== null && !isPDFContent && (
+        <Box
+          $align="center"
+          $justify="center"
+          $color="#666"
+          $background="#f5f5f5"
+          $border="1px solid #ddd"
+          $height="300px"
+          $css={css`
+            text-align: center;
+          `}
+          contentEditable={false}
+          onClick={() => editor.setTextCursorPosition(block)}
+        >
+          {t('Invalid or missing PDF file.')}
+        </Box>
+      )}
       <ResizableFileBlockWrapper
         buttonIcon={
           <Icon iconName="upload" $size="24px" $css="line-height: normal;" />
@@ -92,18 +142,21 @@ const PdfBlockComponent = ({
         block={block as unknown as FileBlockBlock}
         editor={editor as unknown as FileBlockEditor}
       >
-        <Box
-          className="bn-visual-media"
-          role="presentation"
-          as="embed"
-          $width="100%"
-          $height="450px"
-          type="application/pdf"
-          src={pdfUrl}
-          contentEditable={false}
-          draggable={false}
-          onClick={() => editor.setTextCursorPosition(block)}
-        />
+        {!isPDFContentLoading && isPDFContent && (
+          <Box
+            as="embed"
+            className="bn-visual-media"
+            role="presentation"
+            $width="100%"
+            $height="450px"
+            type="application/pdf"
+            src={pdfUrl}
+            aria-label={block.props.name || t('PDF document')}
+            contentEditable={false}
+            draggable={false}
+            onClick={() => editor.setTextCursorPosition(block)}
+          />
+        )}
       </ResizableFileBlockWrapper>
     </Box>
   );
diff --git a/src/frontend/apps/impress/src/features/docs/doc-editor/conf.ts b/src/frontend/apps/impress/src/features/docs/doc-editor/conf.ts
new file mode 100644
index 00000000..f78c1089
--- /dev/null
+++ b/src/frontend/apps/impress/src/features/docs/doc-editor/conf.ts
@@ -0,0 +1 @@
+export const ANALYZE_URL = 'media-check';
diff --git a/src/frontend/apps/impress/src/features/docs/doc-editor/hook/useUploadFile.tsx b/src/frontend/apps/impress/src/features/docs/doc-editor/hook/useUploadFile.tsx
index e2693b41..2687bad9 100644
--- a/src/frontend/apps/impress/src/features/docs/doc-editor/hook/useUploadFile.tsx
+++ b/src/frontend/apps/impress/src/features/docs/doc-editor/hook/useUploadFile.tsx
@@ -6,6 +6,7 @@ import { useTranslation } from 'react-i18next';
 import { backendUrl } from '@/api';
 
 import { useCreateDocAttachment } from '../api';
+import { ANALYZE_URL } from '../conf';
 import { DocsBlockNoteEditor } from '../types';
 
 export const useUploadFile = (docId: string) => {
@@ -46,7 +47,6 @@ export const useUploadFile = (docId: string) => {
  * @param editor
  */
 export const useUploadStatus = (editor: DocsBlockNoteEditor) => {
-  const ANALYZE_URL = 'media-check';
   const { t } = useTranslation();
 
   /**