Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3c17ff5fd562a61…

MALICIOUS

PDF

43.6 KB Created: 2019-03-17 09:56:17 +03:00 Authoring application: calibre 0.9.36 [http://calibre-ebook.com]
MD5: bafdba6e78907a006eaadbb83ee7fb5b SHA-1: 56b322cddd69949d948cc0dde80db70ca19efa84 SHA-256: c3c17ff5fd562a617f8cb7edcb05fb42dbedc7e4538b6b1feb4231b4ecd3572e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment

The PDF contains a large number of embedded links pointing to external PDF files on the domain www.gorillawalker.com. This technique, identified by the PDF_SEO_LINK_FARM heuristic, is often used to distribute malicious content or to engage in SEO manipulation for malicious purposes. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9016

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/moon-fate-deathlands.pdf
    • http://www.gorillawalker.com/advanced-energy-design-guide-for-large-hospitals-50-energy-savings.pdf
    • http://www.gorillawalker.com/paris-haute-couture.pdf
    • http://www.gorillawalker.com/jakarta-undercover-ii.pdf
    • http://www.gorillawalker.com/a-different-light-the-photography-of-sebasti-o-salgado.pdf
    • http://www.gorillawalker.com/an-organist-s-guide-to-resources-for-the-hymnal-1982.pdf
    • http://www.gorillawalker.com/the-papers-of-thomas-jefferson-volume-33-17-february-to.pdf
    • http://www.gorillawalker.com/chaco-trilogy.pdf
    • http://www.gorillawalker.com/rebel-cities-from-the-right-to-the-city-to-the.pdf
    • http://www.gorillawalker.com/probability-and-random-processes-for-electrical-and-computer-engineers.pdf
    • http://www.gorillawalker.com/destruction-of-evidence-2002.pdf
    • http://www.gorillawalker.com/die-lustsklavin-dank-an-meinen-peiniger-german-edition.pdf
    • http://www.gorillawalker.com/an-introduction-to-the-psychodynamics-of-workplace-bullying.pdf
    • http://www.gorillawalker.com/phaithbook.pdf
    • http://www.gorillawalker.com/growing-local-missionaries-equipping-churches-to-sow-shalom-in-their.pdf
    • http://www.gorillawalker.com/the-authority-of-law-essays-on-law-and-morality.pdf
    • http://www.gorillawalker.com/general-surgery-correlations-and-clinical-scenarios.pdf
    • http://www.gorillawalker.com/wild-man-in-borneo-p-jeff-corwin-experience.pdf
    • http://www.gorillawalker.com/airline-tail-colours-3rd-edition-aviation-pocket-guide.pdf
    • http://www.gorillawalker.com/candida-albicans-systemic-candidiasis-an-epidemic-is-growing.pdf
    • http://www.gorillawalker.com/the-european-union-and-global-engagement-institutions-policies-and-challenges.pdf
    • http://www.gorillawalker.com/hike-alabama-an-atlas-of-alabama-s-greateast-hiking-adventures.pdf
    • http://www.gorillawalker.com/beating-fda-to-the-punch-aatb-requires-accredited-tissue-banks.pdf
    • http://www.gorillawalker.com/the-queen-s-lady-the-lacey-chronicles-no-2.pdf
    • http://www.gorillawalker.com/jumbo-bible-coloring-book-jumbo-coloring-book.pdf
    • http://www.gorillawalker.com/unfinished-utopia-nowa-huta-stalinism-and-polish-society-1949-56.pdf
    • http://www.gorillawalker.com/r-2800-pratt-whitney-s-dependable-masterpiece-r-241.pdf
    • http://www.gorillawalker.com/agnes-de-mille-women-in-the-arts.pdf
    • http://www.gorillawalker.com/2015-collins-britain-big-road-atlas-collins-big-road-atlas.pdf
    • http://www.gorillawalker.com/primates-in-the-real-world-escaping-primate-folklore-and-creating.pdf
    • http://www.gorillawalker.com/cut-and-thrust-stone-barrington-book-30-kindle-edition.pdf
    • http://www.gorillawalker.com/intermediate-accounting-with-air-france-klm-2013-annual-report.pdf
    • http://www.gorillawalker.com/matematicas-avanzadas-para-ingenieria-advanced-engineering-mathematics-spanish-edition.pdf
    • http://www.gorillawalker.com/huichol-mythology.pdf
    • http://www.gorillawalker.com/place-based-education-in-the-global-age-local-diversity.pdf
    • http://www.gorillawalker.com/the-book-of-vaginas-a-novella.pdf
    • http://www.gorillawalker.com/paranormal-orientation-swap-the-demon-gay-erotica.pdf
    • http://www.gorillawalker.com/recorder-concerto-no-1-in-g-major-full-score.pdf
    • http://www.gorillawalker.com/survive-in-the-desert-with-the-french-foreign-legion-elite.pdf
    • http://www.gorillawalker.com/the-incredible-space-raiders-from-space.pdf
    • http://www.gorillawalker.com/rebel-cities-f
    • 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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