Malicious PDF — malware analysis report

Static analysis result for SHA-256 88f0e6c8f96f26b6…

MALICIOUS

PDF

45.9 KB Created: 2019-03-17 07:00:45 +03:00 Authoring application: Word (via Mac OS X 10.4.2 Quartz PDFContext)
MD5: 95b1821f96a76d81eac0ad6865d84679 SHA-1: 717ea6dbbeee38211fef06ca9205bd589acabe68 SHA-256: 88f0e6c8f96f26b6356e442a6b8ec443a59550dee8ac0e2f45e960180197107f
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded URLs pointing to external PDF files, a technique often used for SEO manipulation or to distribute malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8974

Heuristics 2

  • 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.
  • 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/crimson-darkness-eventide-vampire-series-book-2.pdf
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    • http://www.gorillawalker.com/princess-ida-vocal-score-vocal-score.pdf
    • http://www.gorillawalker.com/gakuen-alice-volume-4-v-4.pdf
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    • http://www.gorillawalker.com/knock-knock-jokes-for-kids-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/encyclopedia-of-american-popular-fiction-literary-movements.pdf
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    • http://www.gorillawalker.com/major-speeches-and-debates-of-senator-joe-mccarthy-delivered-in.pdf
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    • http://www.gorillawalker.com/dayan-qigong-an-ancient-health-system-for-today-s-modern.pdf
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    • http://www.gorillawalker.com/buddhism-modernity-and-the-state-in-asia-forms-of-engagement.pdf
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    • http://www.gorillawalker.com/surfaces-and-interfaces-in-ceramic-and-ceramic-metal-systems-materials.pdf
    • http://www.gorillawalker.com/long-strange-journey-an-intelligence-memoir.pdf
    • http://www.gorillawalker.com/gakue
    • 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/

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