Malicious PDF — malware analysis report

Static analysis result for SHA-256 91ff865cca8683c4…

MALICIOUS

PDF

42.5 KB Created: 2018-12-15 08:53:04 +03:00 Authoring application: Adobe Illustrator CS3 (via Adobe PDF library 8.00)
MD5: c06e9c260e2d30fc8c4f9dea318c1ae8 SHA-1: 0e15420ebee61a360b88e97208019843a42a3e94 SHA-256: 91ff865cca8683c45a4aaef35df4d013e1bdc012b188e40d189cc87e29ba9978
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF file contains a large number of embedded links to external PDF files hosted on 'gorillawalker.com'. This behavior is indicative of a link farm, often used for SEO manipulation or as a distribution vector for malicious content. The ML classifier also flagged this PDF as malicious with a high probability. No scripts were extracted, and the document body was heavily obfuscated, making it difficult to determine a more specific attack pattern beyond link distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8698

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/industrial-noise-control-handbook.pdf
    • http://www.gorillawalker.com/basic-medical-laboratory-technology.pdf
    • http://www.gorillawalker.com/holt-physics-pennsylvania-laboratory-kit-holt-physics-2006.pdf
    • http://www.gorillawalker.com/un-cuento-guanaco-segunda-edici-n-spanish-edition.pdf
    • http://www.gorillawalker.com/the-secret-of-the-golden-flower-a-chinese-book-of.pdf
    • http://www.gorillawalker.com/measuring-the-risks-and-causes-of-premature-death-summary-of.pdf
    • http://www.gorillawalker.com/das-m-dchen-das-beim-sex-furzte.pdf
    • http://www.gorillawalker.com/black-horizon-jack-swyteck-book-11-unabridged-audible-audio-edition.pdf
    • http://www.gorillawalker.com/the-loaded-brush-collected-poetry-kindle-edition.pdf
    • http://www.gorillawalker.com/call-of-the-white-taking-the-world-to-the-south.pdf
    • http://www.gorillawalker.com/through-dark-woods-kindle-edition.pdf
    • http://www.gorillawalker.com/yoga-ayurveda-self-healing-and-self-realization.pdf
    • http://www.gorillawalker.com/tewkesbury-churchwardens-accounts-1563-1624-gloucestershire-records.pdf
    • http://www.gorillawalker.com/when-i-feel-jealous-way-i-feel-books.pdf
    • http://www.gorillawalker.com/der-himmel-kennt-keine-g-nstlinge-roman-german-edition.pdf
    • http://www.gorillawalker.com/i-beat-the-germs-free-yourself-from-obsessive-compulsive-behaviour.pdf
    • http://www.gorillawalker.com/botanical-gardens-note-nook-2015-calendar.pdf
    • http://www.gorillawalker.com/lessons-in-money-management.pdf
    • http://www.gorillawalker.com/volume-and-surface-integrals-used-in-physics-cambridge-tracts-in.pdf
    • http://www.gorillawalker.com/zap-the-gap-workbook-effective-branding-for-your-business-kindle.pdf
    • http://www.gorillawalker.com/victims-a-true-story-of-the-civil-war.pdf
    • http://www.gorillawalker.com/macmillan-haus-publishing-british-prime-ministers.pdf
    • http://www.gorillawalker.com/how-to-find-your-ideal-country-home-a-comprehensive-guide.pdf
    • http://www.gorillawalker.com/from-the-bering-strait.pdf
    • http://www.gorillawalker.com/nevermore-tales-of-horror-mystery-the-macabre-neo-gothic-fiction.pdf
    • http://www.gorillawalker.com/patch-clamping-an-introductory-guide-to-patch-clamp-electrophysiology.pdf
    • http://www.gorillawalker.com/diego-rivera-1886-1957-un-espiritu-revolucionario-enel-arte-moderno.pdf
    • http://www.gorillawalker.com/honkers-and-shouters-the-golden-years-of-rhythm-and-blues.pdf
    • http://www.gorillawalker.com/meatless-burgers-over-50-quick-easy-recipes-for-america-s.pdf
    • http://www.gorillawalker.com/indonesia-map-irian-jaya-sheet-7-nelles-maps.pdf
    • http://www.gorillawalker.com/the-once-upon-a-time-scratch-and-sniff-book-a.pdf
    • http://www.gorillawalker.com/the-budwig-cancer-coronary-heart-disease-prevention-diet-kindle-edition.pdf
    • http://www.gorillawalker.com/sniper.pdf
    • http://www.gorillawalker.com/maximise-your-health-with-the-blood-type-diet-a-revolutionary.pdf
    • http://www.gorillawalker.com/surveying-7th-edition.pdf
    • http://www.gorillawalker.com/grundz-ge-der-pharmazeutischen-chemie-german-edition.pdf
    • http://www.gorillawalker.com/case-of-the-deadly-lib-cd.pdf
    • http://www.gorillawalker.com/morphogenesis-and-individuation-lecture-notes-in-morphogenesis.pdf
    • http://www.gorillawalker.com/the-encyclopedia-of-social-work-4-volume-set.pdf
    • http://www.gorillawalker.com/parenting-a-child-with-dyslexia-parenting-matters.pdf
    • http://www.gorillaw
    • 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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