Malicious PDF — malware analysis report

Static analysis result for SHA-256 4591966422653a6d…

MALICIOUS

PDF

42.5 KB Created: 2018-11-26 20:05:56 +03:00 Authoring application: QuarkXPress¢â: LaserWriter 8 KH-8.7.1 (via Acrobat Distiller 4.05 for Macintosh)
MD5: 729cec6fcb83b57e26f119207b9d7fc0 SHA-1: d924624d2ece1b1e521c80104fe4cc8a4a5707f3 SHA-256: 4591966422653a6d78d72de8ce753e8ed8c0d8ff7da247d70d05d014baf13e36
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded external links, identified by the PDF_SEO_LINK_FARM heuristic. These links point to various PDF documents hosted on the same domain, suggesting a link farm or content distribution strategy. The ML_NYX_PDF_MALICIOUS heuristic also flagged the document as malicious. No scripts were extracted from this sample. The primary attack pattern appears to be the distribution of numerous links, potentially to manipulate search engine rankings or to serve as a distribution point for other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8242

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/clinical-haemorheology-a-new-approach-to-cerebrovascular-diseases-international-congress.pdf
    • http://www.gorillawalker.com/adaptation-book-i-kindle-edition.pdf
    • http://www.gorillawalker.com/food-chains-and-webs-the-web-of-life.pdf
    • http://www.gorillawalker.com/brilliant-orange-the-neurotic-genius-of-dutch-football.pdf
    • http://www.gorillawalker.com/cudweed-in-outer-space-early-reader.pdf
    • http://www.gorillawalker.com/approximation-theory-lecture-notes-in-pure-and-applied-mathematics.pdf
    • http://www.gorillawalker.com/the-world-of-bede.pdf
    • http://www.gorillawalker.com/pearl-jam-and-eddie-vedder-none-too-fragile.pdf
    • http://www.gorillawalker.com/the-jerusalem-scroll.pdf
    • http://www.gorillawalker.com/jehovah-s-witnesses.pdf
    • http://www.gorillawalker.com/the-last-kappa-of-old-japan-a-magical-journey-of.pdf
    • http://www.gorillawalker.com/god-s-human-face-the-christ-icon-paperback.pdf
    • http://www.gorillawalker.com/concrete-admixtures-handbook-2nd-ed-second-edition-properties-science-and.pdf
    • http://www.gorillawalker.com/combating-climate-change-an-agricultural-perspective.pdf
    • http://www.gorillawalker.com/bloch-s-social-security-law-and-practice-a-handbook-for.pdf
    • http://www.gorillawalker.com/litanies-and-other-prayers-for-the-revised-common-lectionary-year.pdf
    • http://www.gorillawalker.com/archetypes-of-wisdom-an-introduction-to-philosophy.pdf
    • http://www.gorillawalker.com/jean-cocteau-french-edition.pdf
    • http://www.gorillawalker.com/falling-off-the-edge-of-the-world.pdf
    • http://www.gorillawalker.com/es-mejor-dejar-en-paz-a-las-serpientes-it-s.pdf
    • http://www.gorillawalker.com/hidoku-mixed-grids-easy-to-hard-volume-1-156-puzzles.pdf
    • http://www.gorillawalker.com/american-schools-the-art-of-creating-a-democratic-learning-community.pdf
    • http://www.gorillawalker.com/characteristics-of-an-internal-audit-activity.pdf
    • http://www.gorillawalker.com/a-basket-of-summer-fruit.pdf
    • http://www.gorillawalker.com/raced-the-driven-trilogy-volume-4.pdf
    • http://www.gorillawalker.com/daniel-s-christmas-night-stalkers.pdf
    • http://www.gorillawalker.com/the-gondoliers-finale-piano-4-hands-sheet-music.pdf
    • http://www.gorillawalker.com/all-sports-stories-soccer-titles-soccer-star-lorimer-sports-stories.pdf
    • http://www.gorillawalker.com/outreach-ministry-in-the-21st-century-the-encyclopedia-of-practical.pdf
    • http://www.gorillawalker.com/solar-energy-planning-a-guide-to-residential-settlement.pdf
    • http://www.gorillawalker.com/adhd-living-without-brakes.pdf
    • http://www.gorillawalker.com/courage-has-no-color-the-true-story-of-the-triple.pdf
    • http://www.gorillawalker.com/bolivia-webster-s-timeline-history-2001-2007.pdf
    • http://www.gorillawalker.com/kids-design.pdf
    • http://www.gorillawalker.com/ladybird-classics-robin-hood-kindle-edition.pdf
    • http://www.gorillawalker.com/el-don-de-la-honra-spanish-edition.pdf
    • http://www.gorillawalker.com/macroeconomic-modelling-of-the-long-run.pdf
    • http://www.gorillawalker.com/killing-civilians-method-madness-and-morality-in-war.pdf
    • http://www.gorillawalker.com/the-pilot-plant-real-book-a-unique-handbook-for-the.pdf
    • http://www.gorillawalker.com/sacroeconom-a-dinero-obsequio-y-sociedad-en-la-era-de.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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