There is many ways to do so.
Unfortunately PDF utilities are Not free.
If you doing such work a lot the best route to take is to get a PDF2Word utility, and one of the drivers that let you save from word in PDF format.
You convert any PDF to Word, and then with Word you edit the content. Using a PDF print driver for Word you can save the edited content to a PDF file.
This claim to be free Word to PDF (I did not try it myself YMMV).
Link to:
Go2PDF.
:sun: