Malicious PDF — malware analysis report

Heuristics 5

• 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-9983376-2 critical CLAMAV_DETECTION
  ClamAV detected this file as malware: Pdf.Trojan.IcedID-9983376-2
• PDF paints image(s) but contains no text operators medium PDF_IMAGE_ONLY_LURE
  PDF has 2 image XObject(s) and the content stream contains no text-emitting operators (BT/ET, Tj, TJ, ', ") in either raw bytes or decompressed streams — this is the screenshot-as-PDF pattern used to bypass text-based scanners and to deliver instructions purely through rendered pixels. It is informational unless paired with invisible links or risky URI context.
• Embedded JS stream low PDF_JS
  PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
• 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/august-copilot-371717.appspot.com/o/s8wYsa4WgI%2FScan_134_INV_01-24.zip?alt=media&token=4aa44ad5-c2bb-4a4a-a5c2-aa00061d20c1

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