New Malware Loader ‘CountLoader’ Weaponized PDF File to Deliver Ransomware

In recent months, security teams have observed the emergence of a sophisticated malware loader, dubbed CountLoader, which leverages weaponized PDF files to deliver ransomware payloads. First detected in late August 2025, CountLoader is linked to multiple Russian-speaking cybercriminal groups, including affiliates of LockBit, BlackBasta, and Qilin. By masquerading as legitimate documents—often impersonating Ukrainian law enforcement—this […]

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