Malicious PDF — malware analysis report

Static analysis result for SHA-256 bf21d1ecd8982faa…

MALICIOUS

PDF

32.2 KB Created: 2019-12-13 05:24:49 +03:00 Authoring application: Microsoft® Word 2013
MD5: 11a2ee713274a93a294b5002af7652a1 SHA-1: 5bf7b228e98c0323eb080ef5adbc619c42f8feed SHA-256: bf21d1ecd8982faa8b2905fbaa9d1d4b79f7abac20f674cc067bd031913f30f7
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF file contains a large number of embedded links to external PDF documents, primarily hosted on 'gorillawalker.com'. This technique, identified by the 'PDF_SEO_LINK_FARM' heuristic, is often used to artificially inflate search engine rankings or to distribute malicious content indirectly. The ML classifier also flagged the document as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8529

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-stephen-schwartz-songbook-piano-vocal-chords.pdf
    • http://www.gorillawalker.com/primal-diet-made-easy-lose-weight-get-more-energy-and.pdf
    • http://www.gorillawalker.com/guests-of-the-ayatollah-the-first-battle-in-america-s.pdf
    • http://www.gorillawalker.com/homemade-pierogi-authentic-polish-recipies-kindle-edition.pdf
    • http://www.gorillawalker.com/fetal-neurology.pdf
    • http://www.gorillawalker.com/rush-2112-drums-book.pdf
    • http://www.gorillawalker.com/biochemistry-cd-rom-second-edition-the-chemical-reactions-of-living.pdf
    • http://www.gorillawalker.com/human-omega-part-five.pdf
    • http://www.gorillawalker.com/current-procedures-surgery-lange-current-series.pdf
    • http://www.gorillawalker.com/threads-the-reincarnation-of-anne-boleyn.pdf
    • http://www.gorillawalker.com/flying-by-night-book-1-of-the-coven-of-the.pdf
    • http://www.gorillawalker.com/the-cambridge-companion-to-plato-cambridge-companions-to-philosophy.pdf
    • http://www.gorillawalker.com/the-young-oxford-book-of-sports-stories.pdf
    • http://www.gorillawalker.com/voltage-stability-of-electric-power-systems-power-electronics-and-power.pdf
    • http://www.gorillawalker.com/bobobo-bo-bo-bobo-vol-2-v-2.pdf
    • http://www.gorillawalker.com/this-little-piggy-went-to-the-liquor-store-unapologetic-admissions.pdf
    • http://www.gorillawalker.com/eragon-la-guia-de-alagaesia-spanish-edition.pdf
    • http://www.gorillawalker.com/kirk-othmer-encyclopedia-of-chemical-technology-index-to-volumes-1.pdf
    • http://www.gorillawalker.com/giac-certified-forensic-analyst-certification-gcfa-exam-preparation-course-in.pdf
    • http://www.gorillawalker.com/craft-factory-tubes-wise-owl.pdf
    • http://www.gorillawalker.com/the-secrets-of-trading-the-first-pullback-a-price-action.pdf
    • http://www.gorillawalker.com/mathematics-for-children-with-severe-and-profound-learning-difficulties.pdf
    • http://www.gorillawalker.com/higher-spanish-2015-16-sqa-specimen-past-and-hodder-gibson.pdf
    • http://www.gorillawalker.com/electron-microscopy-of-cells-and-tissues-volume-1-instrumentation-and.pdf
    • http://www.gorillawalker.com/inside-venture-capital-past-present-and-future.pdf
    • http://www.gorillawalker.com/cardiac-surgery-essentials-for-critical-care-nursing.pdf
    • http://www.gorillawalker.com/fear-of-dying-a-novel.pdf
    • http://www.gorillawalker.com/consultants-consulting-organizations-directory-26-2v-set.pdf
    • http://www.gorillawalker.com/michael-jackson-for-ukulele.pdf
    • http://www.gorillawalker.com/mining-for-success-investing-in-gold-and-silver-kindle-edition.pdf
    • http://www.gorillawalker.com/the-messiah-a-sacred-oratorio-in-vocal-score-edited-and.pdf
    • http://www.gorillawalker.com/modern-batch-cookery.pdf
    • http://www.gorillawalker.com/dk-eyewitness-travel-guide-australia-ewtg-australia-2015.pdf
    • http://www.gorillawalker.com/perspectives-on-object-centered-learning-in-museums.pdf
    • http://www.gorillawalker.com/barry-sonnenfeld-s-dinosaurs-vs-aliens-hc.pdf
    • http://www.gorillawalker.com/the-power-of-point-of-view-make-your-story-come.pdf
    • http://www.gorillawalker.com/advanced-biology-a-week-by-week-homeschooling-guide.pdf
    • http://www.gorillawalker.com/cassava-value-chain-mapping-uganda.pdf
    • http://www.gorillawalker.com/the-family-guide-to-homeopathy-symptoms-and-natural-solutions.pdf
    • http://www.gorillawalker.com/the-art-and-design-directory-1998-entry.pdf
    • http://www.gorillawalke
    • 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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