Right now I am converting my PDF forms into JPGs in order to upload them and utilize them on Page Builder. I am then creating table links to different portions of the form and basically creating an airtable fill-able pdf. My reasoning for utilizing this instead of just doing the online pdf is because I have portions of documents that need to be filled out by clients and it is much more convenient to send them a link to a form than try and mark up every part I need them to type. This also allows me to capture their response into my database so that I can utilize their information elsewhere. A one and done deal, I can export (automatically) the responses to a csv and directly import them into my title block on the software I use.
I think adding pdfs to the static section of the page builder would be great, especially if it scaled the page by the pdf size.