Malicious PDF — malware analysis report

Heuristics 4

• Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LURE
  PDF uses invisible link annotations and points to a direct payload download. Repeated invisible links or lure-like payload names such as document/unlock/verify archives match malware-delivery PDF carriers where the page is only a prompt and the real payload is fetched from the linked URL.
• ClamAV: Pdf.Trojan.IcedID-9983378-0 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Trojan.IcedID-9983378-0
• Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
  PDF has 2 image(s), only 0 text block(s), carries a click-outward action, and is only 136 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
• Embedded URL info EMBEDDED_URL
  One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
  URL https://firebasestorage.googleapis.com/v0/b/cobalt-nomad-372419.appspot.com/o/OwSq1IMH1D%2FDocument_224_Copy_01-12.zip?alt=media&token=aa49349f-ed98-456b-85c4-ce74daf4a0e3

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