Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fb3cb3c93ecf71…

MALICIOUS

PDF

35.6 KB Created: 2019-12-09 23:39:43 +03:00 Authoring application: Microsoft Word (via Acrobat PDFWriter 3.0f1r8 for Power Macintosh)
MD5: 9f2592751c7952d459cf510acf326a71 SHA-1: 4059ff8f6cc15149ee27827f8ccbdfb899c61132 SHA-256: 21fb3cb3c93ecf713748ccc37e638834c01f75db6f4ae0e86f390bf8d0124822
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF documents, a technique often used for SEO manipulation or to distribute malicious content indirectly. The heuristic 'PDF_SEO_LINK_FARM' specifically identifies this behavior, flagging 32 external links. While no scripts were extracted, the sheer volume of links suggests an attempt to drive traffic or potentially host malicious content on the linked domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8018

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/research-series-in-primary-education-elementary-school-mathematics-problem-solving.pdf
    • http://www.gorillawalker.com/the-columbia-history-of-latinos-in-the-united-states-since.pdf
    • http://www.gorillawalker.com/plant-disease-management.pdf
    • http://www.gorillawalker.com/human-factors-in-simple-and-complex-systems.pdf
    • http://www.gorillawalker.com/archbold-magistrates-courts-criminal-practice-2016.pdf
    • http://www.gorillawalker.com/dulces-conservas-y-embutidos-spanish-edition.pdf
    • http://www.gorillawalker.com/the-seventh-regiment-rhode-island-volunteers-in-the-civil-war.pdf
    • http://www.gorillawalker.com/good-questions-have-small-groups-talking-job.pdf
    • http://www.gorillawalker.com/carbon-nanotubes-synthesis-structure-properties-and-applications.pdf
    • http://www.gorillawalker.com/urban-encounters.pdf
    • http://www.gorillawalker.com/sea-lions-the-zoo-s-who-s-who.pdf
    • http://www.gorillawalker.com/a-feminist-introduction-to-paul.pdf
    • http://www.gorillawalker.com/the-challenger-sale-taking-control-of-the-customer-conversation.pdf
    • http://www.gorillawalker.com/the-truth-about-leadership-the-no-fads-heart-of-the.pdf
    • http://www.gorillawalker.com/informality-social-theory-and-contemporary-practice-international-library-of-sociology.pdf
    • http://www.gorillawalker.com/bonecrack-by-dick-francis-unabridged-audio-book-6cd-s.pdf
    • http://www.gorillawalker.com/the-2007-import-and-export-market-for-blankets-and-travel.pdf
    • http://www.gorillawalker.com/commentary-on-the-united-nations-convention-on-the-rights-of.pdf
    • http://www.gorillawalker.com/the-rogue-of-publisher-s-row-confessions-of-a-publisher.pdf
    • http://www.gorillawalker.com/cooking-up-a-storm-recipes-lost-and-found-from-the.pdf
    • http://www.gorillawalker.com/the-divine-conspiracy-rediscovering-our-hidden-life-in-god.pdf
    • http://www.gorillawalker.com/dramatic-problem-solving-drama-based-group-exercises-for-conflict-transformation.pdf
    • http://www.gorillawalker.com/heat-on-the-street.pdf
    • http://www.gorillawalker.com/find-it-in-5-seconds-gaining-control-in-the-information.pdf
    • http://www.gorillawalker.com/senses-of-the-soul-art-and-the-visual-in-christian.pdf
    • http://www.gorillawalker.com/bird-of-paradise-how-i-became-latina-kindle-edition.pdf
    • http://www.gorillawalker.com/flower-fairies-treasured-photographs.pdf
    • http://www.gorillawalker.com/in-flight-up-in-the-air-volume-1.pdf
    • http://www.gorillawalker.com/eight-simple-concepts-to-improve-your-team-s-zone-attack.pdf
    • http://www.gorillawalker.com/eine-kleine-reise-durch-nova-scotia-german-edition-kindle-edition.pdf
    • http://www.gorillawalker.com/lehrbuch-der-allgemeinen-geographie-bd-1-allgemeine-geomorphologie-von-herbert.pdf
    • http://www.gorillawalker.com/physician-assistants-policy-and-practicephysician-assistants-policy-and-practice-by.pdf
    • http://www.gorillawalker.com/instant-bass-play-right-now-berklee-methods.pdf
    • http://www.gorillawalker.com/narrative-of-a-voyage-to-the-southern-atlantic-ocean-in.pdf
    • http://www.gorillawalker.com/the-big-desire.pdf
    • http://www.gorillawalker.com/the-science-of-doctor-who.pdf
    • http://www.gorillawalker.com/poetic-art-of-nissim-ezekiel.pdf
    • http://www.gorillawalker.com/ford-engine-overhaul-haynes-repair-manuals.pdf
    • http://www.gorillawalker.com/parallel-computer-architecture-a-hardware-software-approach-the-morgan-kaufmann.pdf
    • http://www.gorillawalker.com/orfeo-ed-euridice-dance-of-the-blessed-spirits-no-19.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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