title: If I link to an internal PDF file in Media Wiki, how can I prevent thumbnail display for PDFs?
body: <p>With a syntax like this ...</p>
  
  <pre><code>[[File:foo.pdf]]
  </code></pre>
  
  <p>... it is possible to refer to a file in a MediaWiki page. In this case a thumbnail is generated from the first PDF page and displayed in the rendered view of the page.</p>
  
  <p>My question is: How do I prevent this thumbnail generation and present some PDF specific icon instead? (A single icon for all PDF files?)</p>