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.
If you already have the file available for download somewhere, you can simply add a "Text" question in your form and add a hyperlink with the help your the editor toolbar of text field. Please check the screenshot below:
It is, however, not possible to host the file directly from the form. It would need to be uploaded to another source then linked in the form.