Malicious PDF — malware analysis report

Static analysis result for SHA-256 9230daa6680b5997…

MALICIOUS

PDF

31.2 KB Created: 2020-01-03 01:11:53 +03:00 Authoring application: - (via iText 2.1.0 (by lowagie.com))
MD5: c18cc6fb505a5f9da1491497a56a2da1 SHA-1: 7e59844f33d1519d7808739c30585b98829d27c4 SHA-256: 9230daa6680b59979d435c23c4c76ceeafe1a05c687722422add85db603dad9f
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a mass external PDF link farm, with 32 links pointing to the dominant host www.gorillawalker.com. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the sheer volume of links suggests a malicious intent, possibly for SEO abuse or to distribute further malicious content. The embedded URLs are the primary IOCs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8447

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/the-very-best-of-elton-john-pvg-kindle-edition.pdf
    • http://www.gorillawalker.com/ayurvedic-drug-plants.pdf
    • http://www.gorillawalker.com/lifepac-science-11th-grade.pdf
    • http://www.gorillawalker.com/slaving-and-slavery-in-the-indian-ocean.pdf
    • http://www.gorillawalker.com/wicca-the-beginners-wicca-bible-everything-you-need-to-know.pdf
    • http://www.gorillawalker.com/veronica-s-room.pdf
    • http://www.gorillawalker.com/wild-bunch-women.pdf
    • http://www.gorillawalker.com/the-naked-pilot.pdf
    • http://www.gorillawalker.com/old-quilts-new-life-18-step-by-step-projects-inspired.pdf
    • http://www.gorillawalker.com/sinus-grafting-techniques-a-step-by-step-guide.pdf
    • http://www.gorillawalker.com/race-in-mind-race-iq-and-other-racisms.pdf
    • http://www.gorillawalker.com/latin-sentence-and-idiom-a-composition-course-latin-language-english.pdf
    • http://www.gorillawalker.com/the-basics-of-s-plus-statistics-and-computing.pdf
    • http://www.gorillawalker.com/atlas-of-australian-surfing.pdf
    • http://www.gorillawalker.com/2015-drg-code-reference-diagnosis-related-groups-kindle-edition.pdf
    • http://www.gorillawalker.com/ship-for-brains-cruise-confidential-book-2-kindle-edition.pdf
    • http://www.gorillawalker.com/commerce-with-the-classics-ancient-books-and-renaissance-readers-thomas.pdf
    • http://www.gorillawalker.com/menopause-me-why-am-i-going-through-the-change-of.pdf
    • http://www.gorillawalker.com/rebounding-townsend-library.pdf
    • http://www.gorillawalker.com/tokyo-mew-mew-1-spanish-edition.pdf
    • http://www.gorillawalker.com/the-waite-group-s-unix-communications-and-the-internet.pdf
    • http://www.gorillawalker.com/visitor-s-guide-to-france-dordogne-1990.pdf
    • http://www.gorillawalker.com/siete-crimenes-casi-perfectos-seven-crimes-almost-perfect-spanish-edition.pdf
    • http://www.gorillawalker.com/the-mystery-stud-gay-erotica.pdf
    • http://www.gorillawalker.com/ray-and-wave-chaos-in-ocean-acoustics-chaos-in-waveguides.pdf
    • http://www.gorillawalker.com/discovering-me-a-guide-to-teaching-health-and-building-adolescents.pdf
    • http://www.gorillawalker.com/mel-bay-s-immigrant-song-book.pdf
    • http://www.gorillawalker.com/magnetic-resonance-imaging-in-ischemic-stroke-medical-radiology.pdf
    • http://www.gorillawalker.com/political-disaffection-in-cuba-s-revolution-and-exodus-cambridge-studies.pdf
    • http://www.gorillawalker.com/exercices-de-grammaire-francaise-french-edition.pdf
    • http://www.gorillawalker.com/master-the-ged-social-studies-2002-arco-master-the-ged.pdf
    • http://www.gorillawalker.com/the-2-ingredient-dessert-cookbook-all-the-recipes-have-only.pdf
    • http://www.gorillawalker.com/real-stew-300-recipes-for-authentic-home-cooked-cassoulet-gumbo.pdf
    • http://www.gorillawalker.com/nada-official-used-car-guide-central-edition-passenger-cars-light.pdf
    • http://www.gorillawalker.com/the-sacred-embrace-of-jesus-and-mary-the-sexual-mystery.pdf
    • http://www.gorillawalker.com/the-great-redwall-feast.pdf
    • http://www.gorillawalker.com/ultimo-vol-9.pdf
    • http://www.gorillawalker.com/legal-research-using-westlaw.pdf
    • http://www.gorillawalker.com/changing-face-of-processed-food-industry-in-india.pdf
    • http://www.gorillawalker.com/snake-spirals.pdf
    • http://www.gorillawalker.com/commerce-with-the-classics-ancient-books-and-renai
    • 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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