Unauthorised pdfs of personal details are being created by safari

Hi, so I have a Mac OS Monterey on my MacBook and an iPhone updated to iOS 15.5.

A few days ago I noticed in my iCloud Drive a pdf file named Facebook which I definitely didn't create. When I opened it, was basically a copy of my Facebook feed in a pdf format. When I looked at the info, it says Content creator Safari, encoding software macOS Version 12.3.1 (Build 21E258) Quartz PDFContext.

Last night I was making an online payment and later noticed that it had created a PDF of the payment page with all my banking details and I most definitely did not do that. Can someone please shed light on this mystery? Thank you!