If the document is password-protected or has restrictions such as prohibiting printing or copying, SysTools PDF Unlocker is an effective solution. This tool helps you unlock restricted PDFs by:

• Removing both user and owner passwords.
• Allowing you to edit, copy, or print a previously restricted PDF.
• Batch unlocking multiple files at once.
• Ensuring the original formatting of the PDF remains intact.
• Supporting all PDF versions.

I have used this robust tool for unlocking the PDF file, you can also try this trusted tool to unprotect your document.