Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b96327207239cf8…

MALICIOUS

PDF

42.2 KB Created: 2019-04-11 17:26:12 +03:00 Authoring application: LaTeX with hyperref package (via pdfTeX-1.40.14)
MD5: f5ed57eb95af8e544f6cad47b2b5f0a5 SHA-1: 15060e021a00d2ce21e5b79bb2e09176c060999c SHA-256: 2b96327207239cf811277f989addf509c0d459f3145e7cd1c0436784f78db3dc
90 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a large number of embedded links to other PDF files on the same domain. This behavior is indicative of a link farm, likely intended to distribute malicious content or engage in SEO manipulation. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific 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/fundamentos-de-pruebas-de-software-spanish-edition.pdf
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    • http://www.gorillawalker.com/obstetrics-and-gynaecology-an-evidence-based-text-for-mrcog.pdf
    • http://www.gorillawalker.com/ghost-flower.pdf
    • http://www.gorillawalker.com/the-chinese-prose-poem-a-study-of-lu-xun-s.pdf
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    • http://www.gorillawalker.com/anastasia-florence-nightingale-and-i-a-nurse-s-story.pdf
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    • http://www.gorillawalker.com/curries-spicy-meals-over-100-triple-tested-recipes-easy-to.pdf
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    • http://www.gorillawalker.com/paul-s-pursuit-dragon-lords-of-valdier-book-6-dragon.pdf
    • http://www.gorillawalker.com/health-101-lite.pdf
    • http://www.gorillawalker.com/best-easy-day-hikes-san-luis-obispo-best-easy-day.pdf
    • http://www.gorillawalker.com/seeds-of-health-rediscover-lifelong-health-and-vitality-kindle-edition.pdf
    • http://www.gorillawalker.com/the-human-impact-of-natural-disasters-issues-for-the-inquiry.pdf
    • http://www.gorillawalker.com/ghost-
    • 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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