Malicious PDF — malware analysis report

Static analysis result for SHA-256 8549c84b584c48da…

MALICIOUS

PDF

44.8 KB Created: 2018-11-23 21:03:22 +03:00 Authoring application: Acrobat PDFMaker 10.1 для Word (via Adobe PDF Library 10.0)
MD5: 1fd52771ce51a26de111b531718f813a SHA-1: af947ad2530a730fdd0f1c970131dd6f15877327 SHA-256: 8549c84b584c48dae1a2228b11222b4a3586891c629297e69b0b713be4ef5260
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO spam or to distribute malicious content. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8822

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/child-training-tips.pdf
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    • http://www.gorillawalker.com/fantastic-realms-draw-fantasy-characters-creatures-and-settings.pdf
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    • http://www.gorillawalker.com/archaeological-reconnaissance-in-campeche-quintana-roo-and-peten-carnegie-institution.pdf
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    • http://www.gorillawalker.com/the-art-of-worldly-wisdom-shambhala-pocket-classics.pdf
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    • http://www.gorillawalker.com/fuck-this-book-kindle-edition.pdf
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    • http://www.gorillawalker.com/an-introduction-to-womanist-biblical-interpretation.pdf
    • 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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