note: I am a tech illiterate
I went to the exif tool website and clearly not somethng I would find easy to use
so I googled
tool to remove pdf metadata
and it seems like there are lots of nice easy to use programs - google chrome has one built in ?
eg
my fav software seems to have a metadata removal/sanitize tool
https://www.pdf-xchange.com/search?query=remove+metadata
and also
https://tools.pdf24.org/en/remove-pdf-metadata
https://www.pdfgear.com/pdf-editor-reader/how-to-remove-metadata-from-pdf-file.htm