Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e4271925646e23c…

MALICIOUS

PDF

41.4 KB Created: 2018-11-14 11:20:19 +03:00 Authoring application: Acrobat PDFMaker 5.0 for Word (via Acrobat Distiller 5.0 (Windows))
MD5: 8049db9f90ce1ffc464d6601d821f047 SHA-1: 91e944c43a89c4e06cb881b08aab31a27ece0c4f SHA-256: 9e4271925646e23c0024869bda1d92610d3c83ebb755db11b3fd6fd3bff12265
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 identified. The majority of these links point to PDFs hosted on www.gorillawalker.com. While no scripts were extracted, the sheer volume of links suggests a malicious intent, possibly for SEO manipulation or to distribute further malicious content. The ML classifier also indicated a high probability of maliciousness.

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/fool-me-twice-obama-s-shocking-plans-for-the-next.pdf
    • http://www.gorillawalker.com/oscar-wilde-s-chatterton-literary-history-romanticism-and-the-art.pdf
    • http://www.gorillawalker.com/the-twilight-zone-companion-by-zicree-marc-scott-2nd-second.pdf
    • http://www.gorillawalker.com/the-cloud-forest-a-chronicle-of-the-south-american-wilderness.pdf
    • http://www.gorillawalker.com/drawing-a-contemporary-approach.pdf
    • http://www.gorillawalker.com/the-sandbaggers.pdf
    • http://www.gorillawalker.com/advanced-inorganic-chemistry-second-edition.pdf
    • http://www.gorillawalker.com/how-to-take-your-kids-to-disneyland-even-if-you.pdf
    • http://www.gorillawalker.com/a-mini-guide-to-the-identification-of-new-zealand-spiders.pdf
    • http://www.gorillawalker.com/acoustic-guitar-songs-for-dummies.pdf
    • http://www.gorillawalker.com/magic-in-western-culture-from-antiquity-to-the-enlightenment.pdf
    • http://www.gorillawalker.com/noah-tiny-readers.pdf
    • http://www.gorillawalker.com/the-satanic-witch.pdf
    • http://www.gorillawalker.com/the-shadow-of-kenyan-democracy-widespread-expectations-of-widespread-corruption.pdf
    • http://www.gorillawalker.com/bsava-manual-of-canine-and-feline-nephrology-and-urology-bsava.pdf
    • http://www.gorillawalker.com/you-can-write-great-lyrics.pdf
    • http://www.gorillawalker.com/zen-direct-pointing-to-reality-art-imagination.pdf
    • http://www.gorillawalker.com/the-causes-of-the-fertility-of-the-land-in-the.pdf
    • http://www.gorillawalker.com/canadian-coin-digest.pdf
    • http://www.gorillawalker.com/nobody-s-perfect-acting-edition.pdf
    • http://www.gorillawalker.com/draw-wild-animals-draw-books.pdf
    • http://www.gorillawalker.com/stepsister-sally.pdf
    • http://www.gorillawalker.com/the-practice-of-war-production-reproduction-and-communication-of-armed.pdf
    • http://www.gorillawalker.com/growing-up-in-the-great-depression.pdf
    • http://www.gorillawalker.com/the-cornel-west-reader-basic-civitas-book.pdf
    • http://www.gorillawalker.com/he-lays-the-stones-for-our-steps.pdf
    • http://www.gorillawalker.com/the-portly-pixie-adventure-files-volume-3-kindle-edition.pdf
    • http://www.gorillawalker.com/practical-unigraphics-nx-modeling-for-engineers.pdf
    • http://www.gorillawalker.com/mechanics-of-materials-an-introduction-to-engineering-technology.pdf
    • http://www.gorillawalker.com/1-000-lowfat-recipes.pdf
    • http://www.gorillawalker.com/astrology-for-dummies.pdf
    • http://www.gorillawalker.com/fetal-and-neonatal-brain-injury.pdf
    • http://www.gorillawalker.com/cch-red-green-2015-16-smarteca-digital.pdf
    • http://www.gorillawalker.com/chemical-reactor-modeling-multiphase-reactive-flows.pdf
    • http://www.gorillawalker.com/milfs-erotic-graphic-novel-and-picture-book-milf-s-9.pdf
    • http://www.gorillawalker.com/telesthesia-communication-culture-and-class.pdf
    • http://www.gorillawalker.com/praxis-ii-middle-school-science-5440-exam-secrets-study-guide.pdf
    • http://www.gorillawalker.com/betting-horses-to-win-a-simple-proved-system-of-picking.pdf
    • http://www.gorillawalker.com/compensating-the-sales-force-a-practical-guide-to-designing-winning.pdf
    • http://www.gorillawalker.com/wordly-wise-3000-grade-6-set-student-and-answer-key.pdf
    • http://www.gorillawalker.com
    • 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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