Cybersecurity researchers have discovered a large-scale phishing campaign using fake CAPTCHA images in PDFs to deliver malware. The files, hosted on Webflow’s content delivery network, redirect victims to harmful websites. Over 1,150 organizations and more than 7,000 users have been affected since 2024, primarily in North America, Asia, and Southern Europe. The attackers upload the files to legitimate online libraries and PDF repositories, directing users to them through SEO tactics.
Criminal hackers are increasingly using these tricks to infiltrate corporate systems. Here’s how to stop them
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