Malicious PDF — malware analysis report

Static analysis result for SHA-256 08fc11ed8c1064ff…

MALICIOUS

PDF

42.5 KB Created: 2018-12-02 10:56:42 +03:00 Authoring application: TeX (via pdfTeX-1.40.9)
MD5: a234e91b473ca004a899f36bd7c3d117 SHA-1: fb2c5cfd4b5e8fd82e253a0fb491049d58541042 SHA-256: 08fc11ed8c1064ffea9f3bb0de9d10489cc17d3ee82bf050d6834cf1fec94d1c
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as a dropper and a critical heuristic identified a large number of embedded external links, suggesting a link farm or distribution mechanism. While no scripts were extracted, the sheer volume of links points towards an attempt to manipulate search engine results or redirect users to malicious content. The ML classifier also indicated a high probability of maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8242

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.
  • ClamAV: Pdf.Dropper.Agent-7140427-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7140427-0
  • 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/renuncio-spanish-edition.pdf
    • http://www.gorillawalker.com/financing-public-schools-theory-policy-and-practice.pdf
    • http://www.gorillawalker.com/jane-butel-s-best-of-mexican-recipes-from-the-famous.pdf
    • http://www.gorillawalker.com/photochemistry-of-nitramines-iii-some-potential-intermediates.pdf
    • http://www.gorillawalker.com/kiesha-s-kwanzaa.pdf
    • http://www.gorillawalker.com/the-collected-works-of-william-morris-volume-8-journals-of.pdf
    • http://www.gorillawalker.com/it-s-sid-bernstein-calling-the-promoter-who-brought-the.pdf
    • http://www.gorillawalker.com/from-midnight-til-dawn-a-collection-of-short-tales-of.pdf
    • http://www.gorillawalker.com/hypnotherapy-scripts-a-neo-ericksonian-approach-to-persuasive-healing-by.pdf
    • http://www.gorillawalker.com/mounting-evidence.pdf
    • http://www.gorillawalker.com/heavy-metal-november-1984.pdf
    • http://www.gorillawalker.com/chemiluminescence-principles-and-applications-in-biology-and-medicine-ellis-horwood.pdf
    • http://www.gorillawalker.com/learn-your-times-tables-2-key-stage-2-bk-2.pdf
    • http://www.gorillawalker.com/suicide-spirit.pdf
    • http://www.gorillawalker.com/slow-cooker-meals-cookbook-the-only-slow-cooker-cookbook-you.pdf
    • http://www.gorillawalker.com/supernatural-and-secular-power-in-early-modern-england.pdf
    • http://www.gorillawalker.com/human-factors-issues-in-handgun-safety-and-forensics.pdf
    • http://www.gorillawalker.com/questions-and-answers-preguntas-y-respuestas-talking-hands.pdf
    • http://www.gorillawalker.com/analyse-und-bewertung-dr-potentiellen-stickstoffauswaschung-im-einzugsgebiet-der-grossen.pdf
    • http://www.gorillawalker.com/secret-buddies.pdf
    • http://www.gorillawalker.com/the-norton-book-of-nature-writing-college-edition.pdf
    • http://www.gorillawalker.com/capillary-strength-and-the-menstrual-cycle-annals-of-the-new.pdf
    • http://www.gorillawalker.com/pmp-project-management-professional-a-graphical-study-guide.pdf
    • http://www.gorillawalker.com/business-and-society-stakeholders-ethics-public-policy-13th-edition.pdf
    • http://www.gorillawalker.com/good-simple-cookery.pdf
    • http://www.gorillawalker.com/the-book-of-heartland-cooking.pdf
    • http://www.gorillawalker.com/sentence-correction-1-veritas-prep-gmat-series.pdf
    • http://www.gorillawalker.com/purpose-an-immigrant-s-story.pdf
    • http://www.gorillawalker.com/1-songs-of-the-90-s-trumpet.pdf
    • http://www.gorillawalker.com/parabolas-los-misterios-del-reino-de-dios-revelados-a-traves.pdf
    • http://www.gorillawalker.com/air-sick-humor.pdf
    • http://www.gorillawalker.com/a-heart-for-the-work-journeys-through-an-african-medical.pdf
    • http://www.gorillawalker.com/deck-deconstruction-companion-magic-the-gathering.pdf
    • http://www.gorillawalker.com/the-jungle-sparknotes-literature-guide-sparknotes-literature-guide-series.pdf
    • http://www.gorillawalker.com/learn-to-spin-with-anne-field-spinning-basics.pdf
    • http://www.gorillawalker.com/rand-mcnally-folded-map-north-carolina-rand-mcnally-state-maps.pdf
    • http://www.gorillawalker.com/date-night-hidden-series.pdf
    • http://www.gorillawalker.com/helicopteres-de-combat.pdf
    • http://www.gorillawalker.com/the-stainless-steel-rat-goes-to-hell-stainless-steel-rat.pdf
    • http://www.gorillawalker.com/the-art-of-seo-mastering-search-engine-optimization.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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