However, these tools are far from reliable. Studocu actively combats them by rotating its front-end code, introducing CAPTCHAs, and serving documents as image slices rather than selectable text. As a result, most public downloaders break within weeks. Some are outright scams: instead of delivering a document, they ask users to complete surveys, enter personal information, or download malware. A 2023 analysis by cybersecurity researchers at Digital Shadows noted that over 60% of “academic file downloader” tools hosted on free domains contained adware or trackers.