Hello Sir!
I have already done this type of work. Dynamic stamps consist of the PDF image of the stamp and a text form field that contains JavaScript to make your stamp dynamic. For example, the Dynamic Stamp "Approved" contains a form field that generates username, time and date.
You want to perform this operation on the bulf of pdfs in the every page of the pdf. It can be done.
Thanks,
Mangal Pandey
Thanks,