Malicious PDF — malware analysis report

Static analysis result for SHA-256 d24d8ca45c48a0db…

MALICIOUS

PDF

44.7 KB Created: 2019-04-30 16:29:02 +03:00 Authoring application: LaTeX with hyperref package (via dvips + ps2pdf)
MD5: 19e383bc6212f125f678dcb5e705bf54 SHA-1: cc704848527b52bc667ceedfa6f9f9e587cda283 SHA-256: d24d8ca45c48a0db97248c5db4dcd31608d5a13ab0a49fc81422e7ca504ed8ce
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 pointing to external PDF files on the domain 'gorillawalker.com'. This behavior is indicative of a link farm, likely used for SEO manipulation or to distribute additional malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7914

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/modern-card-counting-modern-blackjack-card-counting-techniques-and-systems.pdf
    • http://www.gorillawalker.com/single-subject-research-application-in-educational-and-clinical-settings.pdf
    • http://www.gorillawalker.com/children-s-picture-encyclopedia.pdf
    • http://www.gorillawalker.com/nighthag.pdf
    • http://www.gorillawalker.com/relief-valve.pdf
    • http://www.gorillawalker.com/rust-belt.pdf
    • http://www.gorillawalker.com/us-army-technical-manual-tm-55-1905-219-20p-2.pdf
    • http://www.gorillawalker.com/free-to-learn-why-unleashing-the-instinct-to-play-will.pdf
    • http://www.gorillawalker.com/close-call-a-jack-doyle-mystery-jack-doyle-series.pdf
    • http://www.gorillawalker.com/the-ray-bradbury-chronicles-volume-3.pdf
    • http://www.gorillawalker.com/ladies-home-journal-100-great-cookie-recipes.pdf
    • http://www.gorillawalker.com/the-future-life-according-to-orthodox-teaching.pdf
    • http://www.gorillawalker.com/dr-atkins-age-defying-diet.pdf
    • http://www.gorillawalker.com/collins-design-and-technology-textiles-foundation-course-collins-design-technology.pdf
    • http://www.gorillawalker.com/a-polar-bear-can-swim-easy-to-read-viking.pdf
    • http://www.gorillawalker.com/deep-web-book-5-the-crush-saga-kindle-edition.pdf
    • http://www.gorillawalker.com/the-solid-state-chemistry-of-binary-metal-hydrides-the-physical.pdf
    • http://www.gorillawalker.com/adult-literacy-policy-and-practice-from-intrinsic-values-to-instrumentalism.pdf
    • http://www.gorillawalker.com/occupational-outlook-handbook-1994-95-occupational-outlook-handbook-jist-works.pdf
    • http://www.gorillawalker.com/steck-vaughn-focus-on-math-student-edition-grade-5-level.pdf
    • http://www.gorillawalker.com/opportunity-programs-opening-the-doors-to-higher-education-hearing-of.pdf
    • http://www.gorillawalker.com/case-briefs-tort-law-vetri-4th-case-briefs-by-rom.pdf
    • http://www.gorillawalker.com/el-mundo-de-la-cerveza-artesanal-the-world-of-craft.pdf
    • http://www.gorillawalker.com/more-is-more-tony-duquette.pdf
    • http://www.gorillawalker.com/pawns-in-a-greater-game-the-buenos-aires-chess-olympiad.pdf
    • http://www.gorillawalker.com/meade-s-breakthrough-at-fredericksburg.pdf
    • http://www.gorillawalker.com/an-evaluation-of-foods-processed-in-tray-pack-versus-two.pdf
    • http://www.gorillawalker.com/color-me-arnold-the-unofficial-arnold-schwarzenegger-coloring-and-activity.pdf
    • http://www.gorillawalker.com/prevention-in-clinical-oral-health-care.pdf
    • http://www.gorillawalker.com/manga-pose-resource-book-1-bk-1.pdf
    • http://www.gorillawalker.com/field-notes-from-the-grand-canyon-raging-river-quiet-mind.pdf
    • http://www.gorillawalker.com/the-sierra-leone-special-court-collection-volume-b-4-1.pdf
    • http://www.gorillawalker.com/uniforms-of-the-ss-volume-1.pdf
    • http://www.gorillawalker.com/the-children-act-a-social-care-guide.pdf
    • http://www.gorillawalker.com/one-wonderful-curve-12-contemporary-quilts.pdf
    • http://www.gorillawalker.com/designing-language-courses-a-guide-for-teachers.pdf
    • http://www.gorillawalker.com/my-love-will-set-you-free-a-cupid-s-bow.pdf
    • http://www.gorillawalker.com/ambushed-by-a-cougar-close-encounters-of-the-wild-kind.pdf
    • http://www.gorillawalker.com/fodor-s-1999-las-vegas-reno-tahoe.pdf
    • http://www.gorillawalker.com/el-agente-secreto-de-dios-la-vida-del-hermano-andr.pdf
    • http://www.gorillawalker.com/free-to-learn-why-unleashing-the-instinct-to-p
    • 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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