Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b509c61adb0f2d…

MALICIOUS

PDF

33.9 KB Created: 2019-12-14 10:40:17 +03:00 Authoring application: (Infix Pro) (via PDFKit.NET 3.0.58.0) First seen: 2020-12-28
MD5: 8de0b3a8d69199f3ffd541edcf7a624f SHA-1: 47137653696d1c5dcd0ea13db5e50cf0db47fc71 SHA-256: 79b509c61adb0f2d5e33f3d8548a198cabc48b26e0de2e980774541808b733e4
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files on the domain 'gorillawalker.com'. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute potentially malicious content. The ML classifier also flagged this PDF as malicious, supporting the suspicious nature of the embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8313

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/basic-corrosion-technology-for-scientists-and-engineers-matsci.pdf In PDF document text
    • http://www.gorillawalker.com/hoax-springs-eternal-the-psychology-of-cognitive-deception.pdfIn PDF document text
    • http://www.gorillawalker.com/bishop-aethelwold.pdfIn PDF document text
    • http://www.gorillawalker.com/rick-hansen-larger-than-life.pdfIn PDF document text
    • http://www.gorillawalker.com/the-long-white-cloud-the-year-in-new-zealand-that.pdfIn PDF document text
    • http://www.gorillawalker.com/day-trade-online.pdfIn PDF document text
    • http://www.gorillawalker.com/the-class-of-click-your-school-was-never-like-this.pdfIn PDF document text
    • http://www.gorillawalker.com/basketball-s-princeton-style-offense-a-simplified-approach-for-high.pdfIn PDF document text
    • http://www.gorillawalker.com/uxl-encyclopedia-of-drugs-and-addictive-substances.pdfIn PDF document text
    • http://www.gorillawalker.com/readings-on-homer-literary-companion-greenhaven-hardcover.pdfIn PDF document text
    • http://www.gorillawalker.com/dark-widow-a-husband-in-hell-succubus-vincennes-four-books.pdfIn PDF document text
    • http://www.gorillawalker.com/the-affairs-of-daura.pdfIn PDF document text
    • http://www.gorillawalker.com/kakadu-to-broome-a-guide-to-northern-australia.pdfIn PDF document text
    • http://www.gorillawalker.com/enjoy-singapore-2012-enjoy-world-travel-series-8-korean-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/affable-savages-an-anthropologist-among-the-urubu-indians-of-brazil.pdfIn PDF document text
    • http://www.gorillawalker.com/guide-to-irish-mythology-folklore-oral-tradition.pdfIn PDF document text
    • http://www.gorillawalker.com/the-ffolliots-of-redmarley.pdfIn PDF document text
    • http://www.gorillawalker.com/enquiries-concerning-human-understanding-and-concerning-the-principles-of-morals.pdfIn PDF document text
    • http://www.gorillawalker.com/resource-management-urbanization-and-governance-in-hong-kong-and-the.pdfIn PDF document text
    • http://www.gorillawalker.com/autocad-and-its-applications-comprehensive-2015.pdfIn PDF document text
    • http://www.gorillawalker.com/traductio-essays-on-punning-and-translation.pdfIn PDF document text
    • http://www.gorillawalker.com/workbook-to-accompany-3-2-1-code-it.pdfIn PDF document text
    • http://www.gorillawalker.com/thomas-jefferson-man-on-a-mountain.pdfIn PDF document text
    • http://www.gorillawalker.com/a-concise-guide-to-market-research-the-process-data-and.pdfIn PDF document text
    • http://www.gorillawalker.com/valiente-clase-media-spanish-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/computational-finite-element-methods-in-nanotechnology.pdfIn PDF document text
    • http://www.gorillawalker.com/red-arrows-celebrating-50-display-seasons-illustrated-kindle-edition.pdfIn PDF document text
    • http://www.gorillawalker.com/concepts-in-federal-taxation-2010-professional-version-book-only.pdfIn PDF document text
    • http://www.gorillawalker.com/island-of-hope-island-of-tears-the-story-of-those.pdfIn PDF document text
    • http://www.gorillawalker.com/senegal-travel-journal-pop-12-969-606-me.pdfIn PDF document text
    • http://www.gorillawalker.com/chihuahua-smart-owner-s-guide.pdfIn PDF document text
    • http://www.gorillawalker.com/teesside-yorkshire-moors-leisure-map-series.pdfIn PDF document text
    • http://www.gorillawalker.com/national-geographic-animal-encyclopedia-2-500-animals-with-photos-maps.pdfIn PDF document text
    • http://www.gorillawalker.com/minds-brains-and-learning-understanding-the-psychological-and-educational-relevance.pdfIn PDF document text
    • http://www.gorillawalker.com/physical-chemistry-principles-and-applications-in-biological-sciences-4th-fourth.pdfIn PDF document text
    • http://www.gorillawalker.com/tarski-s-world-revised-and-expanded-center-for-the-study.pdfIn PDF document text
    • http://www.gorillawalker.com/a-very-stripy-flap-book-pattern-flap-board-books.pdfIn PDF document text
    • http://www.gorillawalker.com/swords-and-deviltry-volume-1.pdfIn PDF document text
    • http://www.gorillawalker.com/the-book-of-the-british-library.pdfIn PDF document text
    • http://www.gorillawalker.com/the-ford-tractor-story-part-two-basildon-to-new-holland.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://www.aiim.org/pdfa/ns/extension/In PDF document text
    • http://www.aiim.org/pdfa/ns/schema#In PDF document text
    • http://www.aiim.org/pdfa/ns/property#In PDF document text
    • http://www.aiim.org/pdfa/ns/id/In PDF document text

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