Yes. Yes there is:
<div id="pdf">
<object width="100%" height="650" type="application/pdf" data="[ImageURLHere]#zoom=85&scrollbar=0&toolbar=0&navpanes=0" id="pdf_content" style="pointer-events: none;">
<p>Insert your error message here, if the PDF cannot be displayed.</p>
</object>
</div>
The style will pointer-events: nonealso prevent users from right-clicking a PDF file and loading it.
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