Malicious PDF — malware analysis report

Static analysis result for SHA-256 33d4f9529cdbe796…

MALICIOUS

PDF

41.5 KB Created: 2018-12-15 20:05:33 +03:00 Authoring application: PScript5.dll Version 5.2 (via Acrobat Distiller 6.0 (Windows))
MD5: 0aa392b211d1236663805b68cd8f5838 SHA-1: e7b17cd0ba24b2ce769072a1145febe834b055ec SHA-256: 33d4f9529cdbe796a4ded9f6daa8aa90c0f365d6d557705bdfcbefd778e35446
110 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various PDF files on the same domain. This suggests a link farm or distribution mechanism. The SE_CALLBACK_LURE heuristic indicates a potential phishing or scam pretext, although no specific text was extracted to confirm this. The ML_NYX_PDF_MALICIOUS heuristic further supports the malicious nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

Heuristics 3

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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 http://www.gorillawalker.com/image-ethics-in-the-digital-age-1st-first-edition.pdf
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    • http://www.gorillawalker.com/explorer-s-guide-maine-sixteenth-edition-explorer-s-complete.pdf
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    • http://www.gorillawalker.com/ho
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://www.aiim.org/pdfa/ns/extension/
    • http://www.aiim.org/pdfa/ns/schema#
    • http://www.aiim.org/pdfa/ns/property#
    • http://www.aiim.org/pdfa/ns/id/