MALICIOUS
170
Risk Score
Malware Insights
MITRE ATT&CK
T1566.002 Spearphishing Attachment
T1059.001 PowerShell
T1204.002 Malicious Link
The sample is a PDF file detected as malicious by ClamAV and an ML classifier. It employs invisible and repeated links to deliver a payload, specifically a ZIP archive from a Google Cloud Storage URL. The PDF structure itself contains no readable text, relying solely on these links to trick the user into downloading the malicious content.
Machine Learning
- Nyx PDF Classifier malicious score 0.8804
Heuristics 4
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Invisible/repeated PDF links deliver payload file critical PDF_REPEATED_PAYLOAD_LINK_LUREPDF 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.
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ClamAV: Pdf.Trojan.IcedID-9983376-2 critical CLAMAV_DETECTIONClamAV detected this file as malware: Pdf.Trojan.IcedID-9983376-2
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PDF paints image(s) but contains no text operators medium PDF_IMAGE_ONLY_LUREPDF 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.
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Embedded URL info EMBEDDED_URLOne 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/ferrous-plating-371721.appspot.com/o/GsU4jkla60%2FDocument_72.zip?alt=media&token=957653c3-f610-455d-9b30-a289c7a72dfc
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