Malicious PDF — malware analysis report

Static analysis result for SHA-256 16ab79760f9b924e…

MALICIOUS

PDF

45.4 KB Created: 2018-12-15 08:32:38 +03:00 Authoring application: Writer (via OpenOffice.org 2.0.3)
MD5: 2a5046a13ae7d10d100cf5b5c2e16250 SHA-1: cf467ef6fb5b08f4af7b2f2fe611c8275726a409 SHA-256: 16ab79760f9b924e53de75063647ee13ab1698eede7bcf93f54e7d3005fb4f00
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files on the domain gorillawalker.com. This is indicative of a link farm or SEO manipulation tactic. The ML classifier also flagged the document as malicious. No scripts were extracted, and the document body was heavily obfuscated, preventing further analysis of its specific intent beyond linking.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8439

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-gap-year-advantage-helping-your-child-benefit-from-time.pdf
    • http://www.gorillawalker.com/materia-medica-of-homeopathic-medicines.pdf
    • http://www.gorillawalker.com/insight-meditation-the-practice-of-freedom-shambhala-classics-kindle-edition.pdf
    • http://www.gorillawalker.com/chart-hits-of-06-07-trumpet-bkcd-hal-leonard-instrumental.pdf
    • http://www.gorillawalker.com/ask-doctor-cory-an-article-from-child-life-html-digital.pdf
    • http://www.gorillawalker.com/views-of-africa-britannica-learning-library.pdf
    • http://www.gorillawalker.com/law-touched-our-hearts-a-generation-remembers-brown-v-board.pdf
    • http://www.gorillawalker.com/duet-concertino-for-clarinet-and-bassoon-with-string-orchestra-and.pdf
    • http://www.gorillawalker.com/the-aarhus-convention-a-guide-for-uk-lawyers.pdf
    • http://www.gorillawalker.com/wood-frog-life-cycles.pdf
    • http://www.gorillawalker.com/warman-s-gas-station-collectibles-identification-and-price-guide.pdf
    • http://www.gorillawalker.com/the-golden-horn-and-sketches-in-asia-minor-egypt-syria.pdf
    • http://www.gorillawalker.com/the-liturgy-documents-volume-four-supplemental-documents-for-parish-worship.pdf
    • http://www.gorillawalker.com/seizures-and-epilepsy-in-childhood-a-guide-johns-hopkins-press.pdf
    • http://www.gorillawalker.com/a-year-in-the-old-testament-meditations-for-each-day.pdf
    • http://www.gorillawalker.com/reality-tv-the-work-of-being-watched-critical-media-studies.pdf
    • http://www.gorillawalker.com/highland-resistance-the-radical-tradition-in-the-scottish-north.pdf
    • http://www.gorillawalker.com/eyewitness-watercolor.pdf
    • http://www.gorillawalker.com/osterinsel-sechs-tage-im-reich-der-moai-ein-reisebericht-mit.pdf
    • http://www.gorillawalker.com/you-can-draw-cartoons-dover-art-instruction.pdf
    • http://www.gorillawalker.com/complexity-and-the-experience-of-managing-in-public-sector-organizations.pdf
    • http://www.gorillawalker.com/juice-alive-second-edition-the-ultimate-guide-to-juicing-remedies.pdf
    • http://www.gorillawalker.com/egypt-an-extraterrestrial-and-time-traveler-experiment.pdf
    • http://www.gorillawalker.com/urban-art-chicago-a-guide-to-community-murals-mosaics-and.pdf
    • http://www.gorillawalker.com/ilam-guide-to-good-practice-leisure-management-institute-of-leisure.pdf
    • http://www.gorillawalker.com/real-tripitaka-and-other-pieces.pdf
    • http://www.gorillawalker.com/of-limits-and-growth-the-rise-of-global-sustainable-development.pdf
    • http://www.gorillawalker.com/psychic-self-protection-using-crystals-to-change-your-life.pdf
    • http://www.gorillawalker.com/hors-d-oeuvres-third-in-the-series-annie-s-elegant.pdf
    • http://www.gorillawalker.com/what-s-in-the-bible-about-the-holy-spirit-why.pdf
    • http://www.gorillawalker.com/evaluating-the-church-growth-movement-5-views-counterpoints-church-life.pdf
    • http://www.gorillawalker.com/silver-recovery-techniques.pdf
    • http://www.gorillawalker.com/going-overboard-the-misadventures-of-a-military-wife-paperback.pdf
    • http://www.gorillawalker.com/from-demons-to-dracula-the-creation-of-the-modern-vampire.pdf
    • http://www.gorillawalker.com/basil-ruffletum-the-lissom-whistle-kindle-edition.pdf
    • http://www.gorillawalker.com/el-cascador-xiii-vol-10.pdf
    • http://www.gorillawalker.com/dietary-supplement-labeling-compliance-review.pdf
    • http://www.gorillawalker.com/the-songs-of-jim-reeves.pdf
    • http://www.gorillawalker.com/how-popular-musicians-learn-a-way-ahead-for-music-education.pdf
    • http://www.gorillawalker.com/alimenta.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/