Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4244027e959798…

MALICIOUS

PDF

43.2 KB Created: 2018-12-15 20:54:57 +03:00 Authoring application: Word (via Mac OS X 10.4.2 Quartz PDFContext)
MD5: b63fcbb948ccee794f396de81e80c7e5 SHA-1: 42cbbb4a5fb1d0b4edfd2fac5f0d4afabd07eea3 SHA-256: 4a4244027e959798e867405ff658cd1ef635b51d7b4f922655aa3f31d09d3008
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links to external PDF files, primarily hosted on www.gorillawalker.com. This heuristic, combined with the ML classifier flagging the document as malicious, suggests a link-farming or redirection attack. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9016

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/essential-relativity-special-general-and-cosmological-texts-and-monographs-in.pdf
    • http://www.gorillawalker.com/piano-concerto-op-16-full-score-a1519.pdf
    • http://www.gorillawalker.com/lighting-secrets-for-the-professional-photographer.pdf
    • http://www.gorillawalker.com/classic-goosebumps-13-welcome-to-dead-house.pdf
    • http://www.gorillawalker.com/a-kid-s-guide-to-being-a-winner.pdf
    • http://www.gorillawalker.com/transcranial-brain-stimulation-frontiers-in-neuroscience.pdf
    • http://www.gorillawalker.com/handbook-of-thermoset-plastics-second-edition-plastics-elastomers.pdf
    • http://www.gorillawalker.com/day-of-thy-power-a-devotional-hymnal.pdf
    • http://www.gorillawalker.com/sobrevivir-a-una-castastrope-urbana-gu-a-de-inicio-r.pdf
    • http://www.gorillawalker.com/a-walk-through-the-highlands-of-scotland-discovering-the-cape.pdf
    • http://www.gorillawalker.com/saunders-review-of-dental-hygiene-2e-by-margaret-j-fehrenbach.pdf
    • http://www.gorillawalker.com/moby-18.pdf
    • http://www.gorillawalker.com/agape-leadership.pdf
    • http://www.gorillawalker.com/best-of-the-best-a-baseball-great-novel.pdf
    • http://www.gorillawalker.com/when-a-city-leans-against-the-sky.pdf
    • http://www.gorillawalker.com/magic-beach.pdf
    • http://www.gorillawalker.com/adjustment-policies-poverty-and-unemployment-the-immpa-framework.pdf
    • http://www.gorillawalker.com/beyond-the-blaydon-races-part-one.pdf
    • http://www.gorillawalker.com/assassini-in-pillole-la-psichiatria-moderna-vista-con-gli-occhi.pdf
    • http://www.gorillawalker.com/amsterdam-inkmap-maps-for-ereaders-sightseeing-museums-going-out-hotels.pdf
    • http://www.gorillawalker.com/secrets-of-the-moneylab-how-behavioral-economics-can-improve-your.pdf
    • http://www.gorillawalker.com/embracing-the-nations-making-disciples-in-a-multicultural-setting.pdf
    • http://www.gorillawalker.com/financial-accounting-student-workbook-tools-for-business-decision-making.pdf
    • http://www.gorillawalker.com/hitch-your-antenna-to-the-stars-early-television-and-broadcast.pdf
    • http://www.gorillawalker.com/libro-de-oro-de-san-pancracio-spanish-edition.pdf
    • http://www.gorillawalker.com/the-courtship-of-the-vicar-s-daughter-the-gresham-chronicles.pdf
    • http://www.gorillawalker.com/guide-to-producing-a-fashion-show-2nd-edition.pdf
    • http://www.gorillawalker.com/daredevil-by-mark-waid-volume-3-by-mark-waid-oct.pdf
    • http://www.gorillawalker.com/ultimate-traps-handbook-the-unofficial-minecraft-tricks-guide-for-minecrafter.pdf
    • http://www.gorillawalker.com/how-to-land-a-top-paying-music-conductors-job-your.pdf
    • http://www.gorillawalker.com/tennessee-wild-scenic-2015-square-12x12.pdf
    • http://www.gorillawalker.com/monsters-made-me-gay-raptor-gangbang.pdf
    • http://www.gorillawalker.com/you-can-t-win-a-fight-with-your-boss-55.pdf
    • http://www.gorillawalker.com/yemen-rediscovered.pdf
    • http://www.gorillawalker.com/the-white-ram-a-story-of-abraham-and-isaac.pdf
    • http://www.gorillawalker.com/stiletto-kindle-edition.pdf
    • http://www.gorillawalker.com/core-skills-spelling-reproducible-grade-4.pdf
    • http://www.gorillawalker.com/the-ice-bowl-the-cold-truth-about-football-s-most.pdf
    • http://www.gorillawalker.com/freedom-from-want-four-freedoms.pdf
    • http://www.gorillawalker.com/discovering-whipton.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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