PDF Forensic Content Verification

I have a set of contract PDFs that must be examined forensically to confirm whether their visible text and the embedded date/time stamps are genuine or have been tampered with. No metadata deep dive or image authentication is required; the focus is strictly on the content itself... (Budget: $15 - $25 USD, Jobs: Data Analysis, Data Entry, Digital Forensics, PDF, Project Management, Report Writing, Research, Technical Writing, Time Management, Word)