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Yes that is possible, you can use the "iFrame Embed" widget for that. If the height you set is shorter than length of the PDF, then it will automatically display a scroll bar.
You can also use the "Text" field, it allows you to add HTML codes like an <iframe> element on it. Here's a guide you can follow: https://www.jotform.com/help/153-How-to-Display-a-PDF-Document-On-Your-Form.
I hope those will help.