Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbcd6c951924ffd6…

MALICIOUS

PDF

41.6 KB Created: 2018-12-02 10:54:56 +03:00 Authoring application: - (via Acrobat Distiller 5.0 (Windows))
MD5: 81161d256c5a47fe9a5478ae7cc0eb3e SHA-1: 8fd6e9d7fcb8b2bce673cb2cedaec0d08d33e026 SHA-256: cbcd6c951924ffd637ac4d192c656cd3804180f255fe698160aedab2eaead05b
90 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. The ML classifier also flagged the document as malicious. The document body is heavily obfuscated and does not provide clear textual lures, but the sheer volume of links suggests a malicious intent, possibly for SEO spam or to distribute further malware. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/grundlagen-naturnaher-gew-ssergestaltung-geomorphologische-entwicklung-von-flie-gew-ssern.pdf
    • http://www.gorillawalker.com/first-man-out-last-man-standing.pdf
    • http://www.gorillawalker.com/bolivia-tax-guide-world-strategic-and-business-information-library.pdf
    • http://www.gorillawalker.com/sleep-disorders-medicine-basic-science-technical-considerations-and-clinical-aspects.pdf
    • http://www.gorillawalker.com/form-1040-tax-preparation-program-module-vi-deductions-and-credits.pdf
    • http://www.gorillawalker.com/the-assassins-a-radical-sect-in-islam.pdf
    • http://www.gorillawalker.com/mef-cecp-2-0-exam-study-guide-for-carrier-ethernet.pdf
    • http://www.gorillawalker.com/palestine-or-the-holy-land-from-the-earliest-period-to.pdf
    • http://www.gorillawalker.com/a-frog-day-suite-piano-solos-for-young-pianists-educational.pdf
    • http://www.gorillawalker.com/travels-with-epicurus-a-journey-to-a-greek-island-in.pdf
    • http://www.gorillawalker.com/modern-differential-equations.pdf
    • http://www.gorillawalker.com/humor-theory-formula-of-laughter.pdf
    • http://www.gorillawalker.com/war-of-the-foxes.pdf
    • http://www.gorillawalker.com/the-new-scientific-angling-trout-and-ultraviolet-vision.pdf
    • http://www.gorillawalker.com/doing-business-in-india-a-framework-for-strategic-understanding-chandos.pdf
    • http://www.gorillawalker.com/tara-duncan-and-the-forbidden-book.pdf
    • http://www.gorillawalker.com/this-is-a-moose.pdf
    • http://www.gorillawalker.com/the-earth-has-a-soul-c-g-jung-on-nature.pdf
    • http://www.gorillawalker.com/elijah-op-70-vocal-score.pdf
    • http://www.gorillawalker.com/vanishing-line-poems.pdf
    • http://www.gorillawalker.com/principles-of-macroeconomics-activist-vs-austerity-policies.pdf
    • http://www.gorillawalker.com/when-your-guts-say-no-a-comprehensive-review-of-irritable.pdf
    • http://www.gorillawalker.com/julius-caesar-modern-library-classics.pdf
    • http://www.gorillawalker.com/my-monet-art-museum.pdf
    • http://www.gorillawalker.com/herpes-simplex-virus-epithelial-keratitis.pdf
    • http://www.gorillawalker.com/innovation-the-attacker-s-advantage.pdf
    • http://www.gorillawalker.com/pre-school-play.pdf
    • http://www.gorillawalker.com/cartesian-tensors-with-applications-to-mechanics-fluid-mechanics-and-elasticity.pdf
    • http://www.gorillawalker.com/i-like-chocolate-welcome-books-good-food.pdf
    • http://www.gorillawalker.com/an-introduction-to-theory-and-applications-of-quantum-mechanics-dover.pdf
    • http://www.gorillawalker.com/heart-harvest-the-world-expo-2010-shanghai-china-sets-volunteer.pdf
    • http://www.gorillawalker.com/technology-and-the-search-for-progress-in-modern-mexico.pdf
    • http://www.gorillawalker.com/fruit-cocktail-salad-recipes-kindle-edition.pdf
    • http://www.gorillawalker.com/combo-hutchison-s-elementary-and-intermediate-algebra-with-mathzone-access.pdf
    • http://www.gorillawalker.com/mark-s-calculations-for-machine-design.pdf
    • http://www.gorillawalker.com/islamic-faith-in-america.pdf
    • http://www.gorillawalker.com/a-wolf-story.pdf
    • http://www.gorillawalker.com/52.pdf
    • http://www.gorillawalker.com/in-his-dreams-vol-2-desires.pdf
    • http://www.gorillawalker.com/hunter-s-moon-kindle-edition.pdf
    • http://www.gorillawalker.com/the-assassins-a-
    • 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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