Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cf1b62e0817ae23…

MALICIOUS

PDF

42.4 KB Created: 2018-12-15 08:53:31 +03:00 Authoring application: calibre 0.9.31 [http://calibre-ebook.com]
MD5: 4e7bc62d017a80d0705c4c41d74a84da SHA-1: c0420e8110f67a8918841b9e7a014605c16bc51d SHA-256: 4cf1b62e0817ae230cc5a56cf753992ca498a185bfd8a0c2f1a3ec203c2c7026
90 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs pointing to PDF documents on the domain 'www.gorillawalker.com'. This is indicative of a link farm or SEO manipulation tactic. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted, and the document body was unreadable, but the sheer volume of external links suggests a malicious intent to drive traffic or distribute further content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9181

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/visible-cities-krakow-visible-cities-guidebook-series.pdf
    • http://www.gorillawalker.com/getting-publicity-self-counsel-business.pdf
    • http://www.gorillawalker.com/genoa-la-superba-the-rise-and-fall-of-a-merchant.pdf
    • http://www.gorillawalker.com/self-paced-training-kit-exam-70-642-configuring-windows-server.pdf
    • http://www.gorillawalker.com/oscar-wilde-and-the-simulacrum-the-truth-of-masks.pdf
    • http://www.gorillawalker.com/canadian-inland-seas.pdf
    • http://www.gorillawalker.com/anthony-eglin-sgarden-of-secrets-past-an-english-garden-mystery.pdf
    • http://www.gorillawalker.com/the-fish-series-christian-green-book.pdf
    • http://www.gorillawalker.com/georgia-immigration-laws-and-regulations-handbook-strategic-information-and-basic.pdf
    • http://www.gorillawalker.com/richard-marx-collection.pdf
    • http://www.gorillawalker.com/the-kornshell-command-and-programming-language.pdf
    • http://www.gorillawalker.com/accidental-happiness.pdf
    • http://www.gorillawalker.com/xilinx-ships-world-s-first-advanced-switching-solution-based-on.pdf
    • http://www.gorillawalker.com/clinical-hepatology-manual-some-water-stains-chinese-edition.pdf
    • http://www.gorillawalker.com/the-director-s-notebook-christian-drama-director-1-kindle-edition.pdf
    • http://www.gorillawalker.com/yes-sir-black-coach-daddy.pdf
    • http://www.gorillawalker.com/ocean-s-trial-ocean-s-gift-turbulence-and-triumph-prequel.pdf
    • http://www.gorillawalker.com/a-surpresa-da-esposa-portuguese-edition.pdf
    • http://www.gorillawalker.com/20-fun-facts-about-stonehenge-fun-fact-file-world-wonders.pdf
    • http://www.gorillawalker.com/india-ancient-civilizations-raintree-steck-vaughn.pdf
    • http://www.gorillawalker.com/entertainment-media-and-the-law-text-only-3rd-third-edition.pdf
    • http://www.gorillawalker.com/echoes-of-silence-letters-to-a-drug-addicted-mother-from.pdf
    • http://www.gorillawalker.com/inferno-the-kindred-series-book-4-volume-4.pdf
    • http://www.gorillawalker.com/a-companion-to-the-works-of-j-m-coetzee-studies.pdf
    • http://www.gorillawalker.com/the-consolations-of-philosophy-and-status-anxiety.pdf
    • http://www.gorillawalker.com/a-primer-of-gis-fundamental-geographic-and-cartographic-concepts.pdf
    • http://www.gorillawalker.com/this-is-my-own-letters-to-wes-other-writings-on.pdf
    • http://www.gorillawalker.com/a-hip-hop-state-of-mind.pdf
    • http://www.gorillawalker.com/an-exorcist-more-stories.pdf
    • http://www.gorillawalker.com/cooking-with-gram-flour-20-gluten-free-recipes-wheat-flour.pdf
    • http://www.gorillawalker.com/from-the-photographic-art-to-the-art-of-photography.pdf
    • http://www.gorillawalker.com/start-run-a-gift-basket-business.pdf
    • http://www.gorillawalker.com/the-experience-of-god-being-consciousness-bliss-unabridged-audible-audio.pdf
    • http://www.gorillawalker.com/out-of-the-corner.pdf
    • http://www.gorillawalker.com/tourism-security-strategies-for-effectively-managing-travel-risk-and-safety.pdf
    • http://www.gorillawalker.com/student-loan-law-consumer-credit-and-sales-legal-practice.pdf
    • http://www.gorillawalker.com/magic-the-gathering-final-sacrifice.pdf
    • http://www.gorillawalker.com/the-world-famous-ratner-s-meatless-cookbook.pdf
    • http://www.gorillawalker.com/a-passion-for-our-grandchildren-our-families-need-us-now.pdf
    • http://www.gorillawalker.com/churchill-s-secret-war-the-british-empire-and-the-ravaging.pdf
    • http://www.gorillawalker.com/anthony-eglin-sgarden-of-secrets-past-an-english-garden-m
    • 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://calibre-ebook.com
    • 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#
    +1 more URL(s)

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