They also like this for the off chance you forgot to disable revision history - so they can look at how you edited the document over time.

This isn’t even necessarily for nefarious reasons. I’ve actually had a case where HR was trying to help by putting in the words that they were stupidly required to find in a resume.

Still not a good sign of a properly functioning organization.

Or to throw it in whatever AI bullshit software they use that doesn't support PDF

If a headhunter wants to put forth my resume as if I already contract with them, then they can start paying me.