JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
You may use our PDF Embedder widget to achieve that https://widgets.jotform.com/widget/pdf_embedder To use it, just head over to your Form Builder > click MORE FIELDS on the left > type in "pdf" on the search box > drag the PDF EMBEDDER widget to your form > enter your PDF's URL > then UPDATE WIDGET. Here's a visual reference:
And here's a demo form http://form.jotformpro.com/form/51863020628957 showing it in action.
Hope that helped! Don't hesitate to get back to us if you need more assistance :)