Malicious PDFs in Play: UAC-0057 Leveraging Invitations to Trigger Shell Script Attacks

The Belarusian-affiliated threat actor UAC-0057, also known as UNC1151, FrostyNeighbor, or Ghostwriter, has been using weaponized archives that contain phony PDFs that are posing as official invitations and documents to target organizations in Poland and Ukraine in a sophisticated cyber espionage campaign. Since April 2025, these operations have utilized compressed archives, such as RAR and […]

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