You can upload files to any Form or Web Form. Select the "File Upload" option under the Standard Field categories to give the individual the ability to upload anything from a JPEG to a PDF on the form.
This standard field allows people to attach files onto your Web Form or Form. For example, if you wanted to create a Web Form for people to submit their job application through your website, users are able to attach a file to your web form (e.g. resumes, cover letters, etc).