hpPostScriptPDE.plugin will damage your computer

[Christian]

That probably is no malware infection. It very well might be related to this issue you already were pondering about:

"hppostprocessing.bundle will damage your computer" -- cannot print anything

Statement by HP: We unintentionally revoked credentials on some older versions of Mac drivers. This caused a temporary disruption for those customers and we are working with Apple to restore the drivers. In the meantime, we recommend users experiencing this problem to uninstall the HP driver and use the native AirPrint driver to print to their printer. More at: https://www.theregister.com/2020/10/23/hp_printer_macos/ This particular issue is due to this revocation snafu like @dsh1705 has hi…

More on that at:
https://discussions.apple.com/thread/251957462