Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c5c10885bb01f5e…

MALICIOUS

PDF

42.8 KB Created: 2019-03-17 07:05:02 +03:00 Authoring application: FrameMaker 10.0.2 (via Acrobat Distiller 9.5.5 (Windows))
MD5: c098d719b7863788f36087b67711a3df SHA-1: 94320f0b41d5ef9c18355d8438e8d024b0600706 SHA-256: 1c5c10885bb01f5e870483153207fd7feb9dc8f4c0f623a9738cfab72ee4a073
90 Risk Score

Malware Insights

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

The PDF sample was flagged by a machine learning classifier as malicious and contains a significant number of embedded links to external PDF files hosted on 'www.gorillawalker.com'. This behavior is indicative of a link farm or SEO manipulation tactic, potentially used to distribute malware or phish for credentials. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the direct user-facing content.

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/the-northern-home-front-of-the-civil-war-why-we.pdf
    • http://www.gorillawalker.com/fluid-mechanics-for-civil-engineers.pdf
    • http://www.gorillawalker.com/nora-the-arctic-fox-fairy-a-rainbow-magic-book-the.pdf
    • http://www.gorillawalker.com/a-z-bristol-and-bath-street-atlas.pdf
    • http://www.gorillawalker.com/computerized-cataloging-technical-manual-chinese-edition.pdf
    • http://www.gorillawalker.com/family-law-text-cases-and-materials-text-cases-and-materials.pdf
    • http://www.gorillawalker.com/insurgencies-constituent-power-and-the-modern-state-theory-out-of.pdf
    • http://www.gorillawalker.com/sda-hymnal-pew-brown.pdf
    • http://www.gorillawalker.com/combinatorial-methods-with-computer-applications-discrete-mathematics-and-its-applications.pdf
    • http://www.gorillawalker.com/three-little-dinosaurs-egg-rescue-meadowside-pic-books.pdf
    • http://www.gorillawalker.com/shades-roswell.pdf
    • http://www.gorillawalker.com/bel-ami-frisky-memories.pdf
    • http://www.gorillawalker.com/the-bear-s-embrace-bbw-werebear-pregnancy-paranormal-erotic-romance.pdf
    • http://www.gorillawalker.com/the-techniques-of-springboard-diving-1969-cloth-with-dustjacket.pdf
    • http://www.gorillawalker.com/deo-gracias-from-a-ceremony-of-carols-satb-with-harp.pdf
    • http://www.gorillawalker.com/bill-clinton-42nd-president-of-the-united-states-united-states.pdf
    • http://www.gorillawalker.com/construction-business-management.pdf
    • http://www.gorillawalker.com/warbirds-gallery.pdf
    • http://www.gorillawalker.com/what-the-music-said-black-popular-music-and-black-public.pdf
    • http://www.gorillawalker.com/out-of-the-blue-six-non-medication-ways-to-relieve.pdf
    • http://www.gorillawalker.com/overnight-oat-cookbook-the-ultimate-recipe-book-for-making-healthy.pdf
    • http://www.gorillawalker.com/silhouette-a-peacer-novel.pdf
    • http://www.gorillawalker.com/small-library-cataloging-3rd-edition-by-hoffman-herbert-published-by.pdf
    • http://www.gorillawalker.com/the-little-brown-compact-handbook-fifth-5th-edition.pdf
    • http://www.gorillawalker.com/grasslands-biomes-of-the-earth.pdf
    • http://www.gorillawalker.com/winters-in-algeria.pdf
    • http://www.gorillawalker.com/certain-sainthood-canonization-and-the-origins-of-papal-infallibility-in.pdf
    • http://www.gorillawalker.com/music-for-three-vol-4-rags-waltzes-part-3-cello.pdf
    • http://www.gorillawalker.com/help-your-kids-with-computer-coding-kindle-edition.pdf
    • http://www.gorillawalker.com/thomas-alva-edison-great-inventor-great-inventor-scholastic-biography.pdf
    • http://www.gorillawalker.com/the-world-of-kung-shang-jen-studies-in-oriental-culture.pdf
    • http://www.gorillawalker.com/irish-soldiers-in-europe-17th-19th-century.pdf
    • http://www.gorillawalker.com/dragon-tails-volume-three-a-gallery-girls-book-gallery-girls.pdf
    • http://www.gorillawalker.com/bio-aggregate-based-building-materials-applications-to-hemp-concretes.pdf
    • http://www.gorillawalker.com/numerical-modeling-in-open-channel-hydraulics-water-science-and-technology.pdf
    • http://www.gorillawalker.com/test-your-defensive-play-master-bridge-series.pdf
    • http://www.gorillawalker.com/an-american-in-paris-bfi-film-classics.pdf
    • http://www.gorillawalker.com/six-months-to-live-the-dawn-rochelle-series-book-one.pdf
    • http://www.gorillawalker.com/sicily-palermo-the-northwest-footprint-focus-guide-includes-cefal.pdf
    • http://www.gorillawalker.com/diy-easy-10-woodworking-projects-beginners-have-fun-woodworking-plans.pdf
    • http://www.gorillawalker.com/combina
    • 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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