Malicious PDF — malware analysis report

Static analysis result for SHA-256 6131a8fd87fe4c61…

MALICIOUS

PDF

40.9 KB Created: 2019-03-16 12:37:49 +03:00 Authoring application: - (via Acrobat Distiller 7.0 (Windows))
MD5: f2689e33c08512b9a3804dd412d37e81 SHA-1: 498eeac8750ea87630f15cabdaf4427b31a25491 SHA-256: 6131a8fd87fe4c61a43336201ca0ef8a9dbc3a8b2bfa22445f317d8a0f798975
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF files on the 'gorillawalker.com' domain. The ML classifier also flagged this PDF as malicious. The primary attack pattern appears to be the distribution of a link farm, potentially for SEO manipulation or to serve as a distribution point for other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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/why-feet-smell-and-other-gross-facts-about-your-body.pdf
    • http://www.gorillawalker.com/lebron-james-famous-athletes.pdf
    • http://www.gorillawalker.com/the-admissions-a-novel.pdf
    • http://www.gorillawalker.com/the-carlsons-more-sex-than-ever-book-two-kindle-edition.pdf
    • http://www.gorillawalker.com/forever-richard-jackson-book.pdf
    • http://www.gorillawalker.com/oscillation-theory-computation-and-methods-of-compensated-compactness-the-ima.pdf
    • http://www.gorillawalker.com/hovory-s-chan-sanem-obrazova-poezie-czech-edition.pdf
    • http://www.gorillawalker.com/by-gardner-understanding-juvenile-law-3rd-third-edition.pdf
    • http://www.gorillawalker.com/amadeus-a-play-by-peter-shaffer.pdf
    • http://www.gorillawalker.com/100-brand-new-r-labor-and-social-security-law-chinese.pdf
    • http://www.gorillawalker.com/the-journal-of-a-tour-to-corsica-and-memoirs-of.pdf
    • http://www.gorillawalker.com/consequence-the-aftermath-sequel-to-i-cried-you-didn-t.pdf
    • http://www.gorillawalker.com/radio-reader-essays-in-the-cultural-history-of-radio.pdf
    • http://www.gorillawalker.com/the-nature-of-human-values.pdf
    • http://www.gorillawalker.com/the-broken-paddle-a-story-of-the-war-of-1812.pdf
    • http://www.gorillawalker.com/jealousy-how-to-deal-with-your-college-boyfriend-conquer-relationship.pdf
    • http://www.gorillawalker.com/volkswagen-new-beetle-1998-2005-chilton-s-total-car-care.pdf
    • http://www.gorillawalker.com/traditional-architecture-timeless-building-for-the-twenty-first-century.pdf
    • http://www.gorillawalker.com/the-contemporary-japanese-economy-between-civil-society-and-corporation-centered.pdf
    • http://www.gorillawalker.com/uniform-system-of-accounts-and-expense-dictionary-for-small-hotels.pdf
    • http://www.gorillawalker.com/the-homeschool-year-planner-up-to-42-weeks-of-lesson.pdf
    • http://www.gorillawalker.com/danila-tkachenko-escape.pdf
    • http://www.gorillawalker.com/initiating-isobel-a-regency-erotica-school-for-whores-book-1.pdf
    • http://www.gorillawalker.com/the-jamaican-word-search.pdf
    • http://www.gorillawalker.com/baron-von-baddie-and-the-ice-ray-incident.pdf
    • http://www.gorillawalker.com/the-missing-mummy-a-to-z-mysteries.pdf
    • http://www.gorillawalker.com/barbara-barber-s-solos-for-young-violinists-volume-1-set.pdf
    • http://www.gorillawalker.com/b-j-of-davenport-the-early-years-of-chiropractic.pdf
    • http://www.gorillawalker.com/the-rite-of-spring-dover-miniature-music-scores.pdf
    • http://www.gorillawalker.com/on-a-syriac-geographical-chart.pdf
    • http://www.gorillawalker.com/revisiting-rural-places-challenges-of-the-agrarian-transition-in-southeast.pdf
    • http://www.gorillawalker.com/communication-miracles-for-couples-2nd-second-edition-byrobinson.pdf
    • http://www.gorillawalker.com/sheet-3-sweden-south-east-stockholm-uppsala-norrkoping-road-maps.pdf
    • http://www.gorillawalker.com/churchill-a-biography.pdf
    • http://www.gorillawalker.com/heavy-metal-magazine-march-1980-vol-iii-no-11.pdf
    • http://www.gorillawalker.com/practical-guide-to-rotational-moulding-second-edition.pdf
    • http://www.gorillawalker.com/engineering-for-storage-of-fruits-and-vegetables-cold-storage-controlled.pdf
    • http://www.gorillawalker.com/finance.pdf
    • http://www.gorillawalker.com/basketball-how-to-play-the-all-star-way.pdf
    • http://www.gorillawalker.com/tribes-tales-from-the-tribes-of-the-central-metropolitan-region.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/

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