Malicious PDF — malware analysis report

Static analysis result for SHA-256 acbbb1098fe32c31…

MALICIOUS

PDF

44.0 KB Created: 2018-12-14 20:05:38 +03:00 Authoring application: Adobe Acrobat 8.1 Combine Files (via Acrobat Distiller 8.1.0 (Windows))
MD5: 5a664fd5bc25fba9606531b5d850f6c1 SHA-1: 5dd1c1bf352ab975913041ebb4f9c62df425a740 SHA-256: acbbb1098fe32c310a51e3a27c1f6e65a874ee64228a11ace5d5ad4d5bf5705d
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links to external PDF files, a technique often used for SEO manipulation or to distribute further malicious content. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9171

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/certified-arborist-exam-flashcard-study-system-arborist-test-practice-questions.pdf
    • http://www.gorillawalker.com/learnsmart-standalone-online-access-for-mader-inquiry-into-life-14e.pdf
    • http://www.gorillawalker.com/erich-kastner-und-der-film-mit-den-songtexten-kastners-aus.pdf
    • http://www.gorillawalker.com/shared-decision-making-in-school-age-children-with-asthma-continuing.pdf
    • http://www.gorillawalker.com/power-quality-var-compensation-in-power-systems.pdf
    • http://www.gorillawalker.com/stile-number-facts-and-calculating-book-5.pdf
    • http://www.gorillawalker.com/gene-therapy-prospective-technology-assessment-in-its-societal-context.pdf
    • http://www.gorillawalker.com/psychoacoustics-facts-and-models-springer-series-in-information-sciences.pdf
    • http://www.gorillawalker.com/a-historical-phonology-of-english-edinburgh-textbooks-on-the-english.pdf
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    • http://www.gorillawalker.com/demograf.pdf
    • http://www.gorillawalker.com/christina-queen-of-sweden-the-restless-life-of-a-european.pdf
    • http://www.gorillawalker.com/nooks-and-crannies-of-old-istanbul-fener-balat-ayvansaray.pdf
    • http://www.gorillawalker.com/medjugorje-20-years-later-the-questions-linger-bosnia-an-article.pdf
    • http://www.gorillawalker.com/how-the-printing-press-changed-history-essential-library-of-inventions.pdf
    • http://www.gorillawalker.com/small-animal-surgical-nursing-2e.pdf
    • http://www.gorillawalker.com/a-concise-companion-to-the-study-of-manuscripts-printed-books.pdf
    • http://www.gorillawalker.com/socio-economic-and-environmental-study-of-river-rafting-in-uttarakhand.pdf
    • http://www.gorillawalker.com/florida-straits-key-west-capers-book-1-kindle-edition.pdf
    • http://www.gorillawalker.com/religions-of-mesoamerica-second-edition.pdf
    • http://www.gorillawalker.com/us-a-narrative-history-volume-2-since-1865.pdf
    • http://www.gorillawalker.com/caracas-sus-esquinas-imagenes-y-anhelos-spanish-edition.pdf
    • http://www.gorillawalker.com/introduction-to-mechatronics-and-measurement-systems-3rd-international-edition.pdf
    • http://www.gorillawalker.com/student-course-guide-for-hales-an-invitation-to-health-choosing.pdf
    • http://www.gorillawalker.com/stretching-for-functional-flexibility.pdf
    • http://www.gorillawalker.com/personal-and-community-health.pdf
    • http://www.gorillawalker.com/route-66-spirit-of-the-mother-road.pdf
    • http://www.gorillawalker.com/laboratory-animal-anaesthesia-third-edition.pdf
    • http://www.gorillawalker.com/return-to-the-sea.pdf
    • http://www.gorillawalker.com/historic-structure-report-bodie-island-life-saving-station-boat-house.pdf
    • http://www.gorillawalker.com/second-1st-chance.pdf
    • http://www.gorillawalker.com/arco-master-the-lsat-with-cd-rom.pdf
    • http://www.gorillawalker.com/modern-morphometrics-in-physical-anthropology-developments-in-primatology-progress-and.pdf
    • http://www.gorillawalker.com/2837ot-lac-d-issarles-thueyts-sources-de-la-loire-gps.pdf
    • http://www.gorillawalker.com/elliott-wave-principle-as-applied-to-the-london-stock-market.pdf
    • http://www.gorillawalker.com/watching-my-doctor-husband-with-the-younger-nurse-cuckquean-erotica.pdf
    • http://www.gorillawalker.com/stile-number-
    • 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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