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The short answer is that it can be done, but probably not implemented in the way you want. Image files and PDFs need other programs to open them. In other words, they are not self-executable. The only solutions that I can think of are using a DRM company like Digify, or have some kind of custom .bat or .exe file "seek and destroy" the files you need deleted. If you are not a coder, then both solutions are expensive. And with the custom delete program, I am not sure that your clients would want to install it even if they could.
Another possibility could be storing the files in the cloud and restrict access to Read Only for a limited time period.
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