Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1a259e923fcb27…

MALICIOUS

PDF

36.3 KB Created: 2020-01-17 19:19:21 +03:00 Authoring application: Adobe InDesign CS4 (6.0.6) (via Adobe PDF Library 9.0)
MD5: b60dcb22482ec6bd0a419c04c8eba1d9 SHA-1: f5916f46eb3ae528a4add2d09f097cbf435ec4fb SHA-256: 7a1a259e923fcb270c6faed01d34342de03e2ebfba85412b635305efd402c11c
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF file was flagged by a machine learning classifier as malicious. Static analysis revealed a large number of embedded URLs, specifically 32, pointing to external PDF files on the domain 'gorillawalker.com'. This pattern is indicative of a link farm, often used for SEO manipulation or to distribute malicious content disguised as legitimate documents. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8218

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/p-dorsey-s-j-mansueto-s-the-five-rules-for.pdf
    • http://www.gorillawalker.com/chromatic-polynomials-and-chromaticity-of-graphs.pdf
    • http://www.gorillawalker.com/earthquake-country-how-why-when-earthq.pdf
    • http://www.gorillawalker.com/the-supermarket-trap-the-consumer-and-the-food-industry.pdf
    • http://www.gorillawalker.com/hummingbird-bakery-halloween-and-bonfire-night-bakes-an-extract-from.pdf
    • http://www.gorillawalker.com/in-the-arkansas-backwoods-tales-and-sketches.pdf
    • http://www.gorillawalker.com/frank-lloyd-wright-s-imperial-hotel-dover-books-on-architecture.pdf
    • http://www.gorillawalker.com/chemistry-student-book-1-collins-aqa-a-level-science.pdf
    • http://www.gorillawalker.com/interviewing-principles-and-practices.pdf
    • http://www.gorillawalker.com/bioquimica-las-bases-moleculares-de-la-estructura-y-funcion-celular.pdf
    • http://www.gorillawalker.com/henri-michaux-experimentation-with-signs-faux-titre.pdf
    • http://www.gorillawalker.com/faulkner-reader.pdf
    • http://www.gorillawalker.com/popular-norwegian-poems-in-english-translation.pdf
    • http://www.gorillawalker.com/justifying-historical-descriptions-cambridge-studies-in-philosophy.pdf
    • http://www.gorillawalker.com/intelligent-transportation-systems-smart-and-green-infrastructure-design-second-edition.pdf
    • http://www.gorillawalker.com/effluent-america-cities-industry-energy-and-the-environment-pittsburgh-hist.pdf
    • http://www.gorillawalker.com/diabetes-diet-eating-guide-for-diabetics-delicious-recipes-for-diabetes.pdf
    • http://www.gorillawalker.com/philidor-files-detailed-coverage-of-a-dynamic-opening-everyman-chess.pdf
    • http://www.gorillawalker.com/eco-innovation-and-the-development-of-business-models-lessons-from.pdf
    • http://www.gorillawalker.com/tranquebar-a-season-in-south-india.pdf
    • http://www.gorillawalker.com/great-political-theories-v-1-a-comprehensive-selection-of-the.pdf
    • http://www.gorillawalker.com/frank-lloyd-wright-s-california-houses-wright-at-a-glance.pdf
    • http://www.gorillawalker.com/electronics-a-top-down-approach-to-computer-aided-circuit-design.pdf
    • http://www.gorillawalker.com/sober-for-good-new-solutions-for-drinking-problems-advice-from.pdf
    • http://www.gorillawalker.com/allergies-and-candida-with-the-physicist-s-rapid-solution.pdf
    • http://www.gorillawalker.com/2014-cocktails-wall-calendar.pdf
    • http://www.gorillawalker.com/the-right-choice-the-incredible-failure-of-public-education-and.pdf
    • http://www.gorillawalker.com/republic-or-death-travels-in-national-anthems.pdf
    • http://www.gorillawalker.com/the-prince-of-tennis-23.pdf
    • http://www.gorillawalker.com/a-century-of-emblems-an-introductory-anthology.pdf
    • http://www.gorillawalker.com/a-government-that-worked-better-and-cost-less-evaluating-three.pdf
    • http://www.gorillawalker.com/bodyline-autopsy-the-full-story-of-the-most-sensational-test.pdf
    • http://www.gorillawalker.com/ancient-astronomy-and-celestial-divination-dibner-institute-studies-in-the.pdf
    • http://www.gorillawalker.com/lucretius-his-six-books-of-epicurean-philosophy-and-manilius-his.pdf
    • http://www.gorillawalker.com/02-odin-s-ravens-blackwell-pages-number-2-in-series.pdf
    • http://www.gorillawalker.com/looking-closer-critical-writings-on-graphic-design.pdf
    • http://www.gorillawalker.com/by-george-collison-facilitating-online-learning-effective-strategies-for-moderators.pdf
    • http://www.gorillawalker.com/social-media-in-the-workplace-a-handbook.pdf
    • http://www.gorillawalker.com/the-murder-of-tutankhamen.pdf
    • http://www.gorillawalker.com/fifteen-poets-of-the-aztec-world.pdf
    • http://www.gorillawalker.com/interviewing-principles-and-pr
    • 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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