How to know if a .pdf contains malware?

I read somewhere that .pdf files can contain javascript file that run when opened. There is a very good computer science book I wanted to read about computer architecture, but of course it’s $40 and I don’t have that money at the moment. So logically I search for a free PDF version, but remember that fact, I am now scared to open it. Is there anyway to detect if the file contains malware, and then remove it if so.

submitted by /u/Apprehensive-Oil713
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