Malicious PDF — malware analysis report

Static analysis result for SHA-256 b57d65d75b23c594…

MALICIOUS

PDF

40.5 KB Created: 2018-12-15 08:11:10 +03:00 Authoring application: Acrobat PDFMaker 7.0 for Word (via Acrobat Distiller 7.0 (Windows))
MD5: deabb0d831acece672be4a61432ddd1b SHA-1: 3278d067827a1e0e680d93abb76778331eaafb1b SHA-256: b57d65d75b23c594a02bdcb1db8149338b8dd271678aefad4b1e98872834cb88
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 websites, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the sheer volume of links suggests an attempt to direct users to potentially harmful content or to manipulate search engine rankings. The document body was unreadable, preventing a more specific assessment of the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/yolele-recipes-from-the-heart-of-senegal.pdf
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    • http://www.gorillawalker.com/to-save-everything-click-here-the-folly-of-technological-solutionism.pdf
    • http://www.gorillawalker.com/shokuminchi-honkon-no-kozo-henka-kenkyu-sosho-japanese-edition.pdf
    • http://www.gorillawalker.com/amy-harrison-or-heavenly-seed-and-heavenly-dew-paperback-common.pdf
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    • http://www.gorillawalker.com/atlas-of-ultrasound-in-obstetrics-and-gynecology-a-multimedia-reference.pdf
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    • http://www.gorillawalker.com/be-understood-book-with-cd-rom-and-audio-cd-pack.pdf
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    • http://www.gorillawalker.com/the-activist-learner-inquiry-literacy-and-service-to-make-learning.pdf
    • http://www.gorillawalker.com/shokuminchi-honkon-no-kozo-henka-kenkyu-sosho-japanese
    • 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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