Malicious PDF — malware analysis report

Static analysis result for SHA-256 db4e109b244626fc…

MALICIOUS

PDF

42.6 KB Created: 2018-11-23 21:09:15 +03:00 Authoring application: - (via Xerox Fiery DC250 2.0[EFI Cyclone])
MD5: 7167b00e62916d566bd1e64eb157926d SHA-1: 4286048ec2507167dd44a7f481a5cf978bbc6d21 SHA-256: db4e109b244626fcab85cd0fb9e375e99a105d29b986808fd5b34574256fd57a
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF file was flagged by a machine learning classifier as malicious and contains a large number of external links, indicating a potential SEO poisoning or link farm attack. While no scripts were extracted, the sheer volume of links to other PDF documents suggests an attempt to either distribute further malicious content or manipulate search engine results. The embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

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/an-exemplar-of-antique-furniture-design.pdf
    • http://www.gorillawalker.com/bridging-occupational-organizational-and-public-health-a-transdisciplinary-approach.pdf
    • http://www.gorillawalker.com/tonight-and-always.pdf
    • http://www.gorillawalker.com/psalms-1-50-kindle-edition.pdf
    • http://www.gorillawalker.com/historia-verdadera-de-la-conquista-de-la-nueva-espana-ii.pdf
    • http://www.gorillawalker.com/you-who-board-game-grades-1-5.pdf
    • http://www.gorillawalker.com/centre-for-fortean-zoology-yearbook-2002.pdf
    • http://www.gorillawalker.com/free-electron-lasers-1999.pdf
    • http://www.gorillawalker.com/hidden-in-plain-view-love-inspired-large-print-suspense.pdf
    • http://www.gorillawalker.com/fundamentals-of-navigation-and-inertial-sensors.pdf
    • http://www.gorillawalker.com/instead-of-prisons-a-handbook-for-abolitionists.pdf
    • http://www.gorillawalker.com/fruit-of-the-spirit-a-bible-study-project-for-women.pdf
    • http://www.gorillawalker.com/fun-damentals-puns-parables-and-perilous-predicaments-adventures-in-odyssey.pdf
    • http://www.gorillawalker.com/russian-edition.pdf
    • http://www.gorillawalker.com/the-elder-brothers-warning.pdf
    • http://www.gorillawalker.com/take-me-hard-compilation.pdf
    • http://www.gorillawalker.com/horse-soldiers-the-extraordinary-story-of-a-band-of-us.pdf
    • http://www.gorillawalker.com/prentice-hall-science-explorer-cells-and-heredity.pdf
    • http://www.gorillawalker.com/iphone-ios-7-quick-starter-guide-for-iphone-4-iphone.pdf
    • http://www.gorillawalker.com/heteropoly-and-isopoly-oxometalates-inorganic-chemistry-concepts-volume-8.pdf
    • http://www.gorillawalker.com/leo-and-the-lesser-lion.pdf
    • http://www.gorillawalker.com/christmas-crafts-made-easy-creative-ideas.pdf
    • http://www.gorillawalker.com/fashion-now-2-v-2.pdf
    • http://www.gorillawalker.com/okehampton-north-dartmoor-os-landranger-active-map.pdf
    • http://www.gorillawalker.com/warhammer-high-elves-french-edition.pdf
    • http://www.gorillawalker.com/both-wings-flappin-still-not-flyin.pdf
    • http://www.gorillawalker.com/balancing-the-secrets-of-private-disclosures-routledge-communication-series.pdf
    • http://www.gorillawalker.com/everyday-raw.pdf
    • http://www.gorillawalker.com/digital-control-system-analysis-and-design-3rd-edition.pdf
    • http://www.gorillawalker.com/the-were-wolf-kindle-edition.pdf
    • http://www.gorillawalker.com/counting-sheep-the-science-and-pleasures-of-sleep-and-dreams.pdf
    • http://www.gorillawalker.com/gene-transfer-studies-of-the-pathogenesis-and-treatment-of-parkinson.pdf
    • http://www.gorillawalker.com/luigi-s-baton-and-the-orchestra-family-reunion-a-study.pdf
    • http://www.gorillawalker.com/on-liberty-hackett-classics-kindle-edition.pdf
    • http://www.gorillawalker.com/call-of-the-snakegirl-metamorphosis-breeding-erotica-the-honeypot-series.pdf
    • http://www.gorillawalker.com/m-de-garsault-s-1767-art-of-the-shoemaker-an.pdf
    • http://www.gorillawalker.com/natural-liver-detox-diet-cleanse-detoxify-your-body-lose-weight.pdf
    • http://www.gorillawalker.com/too-hot-to-trot-3-cowboy-way-kindle-edition.pdf
    • http://www.gorillawalker.com/kuniyoshi-utagawa-edo-erotic-art-collection-by-yoshikazu-hayashi-vol.pdf
    • http://www.gorillawalker.com/10-days-on-earth.pdf
    • http://www.gorillawalker.com/centre-for-fortean-zoology-yearbook-2002
    • 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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