Malicious PDF — malware analysis report

Static analysis result for SHA-256 729eac91c7b87311…

MALICIOUS

PDF

41.7 KB Created: 2018-12-15 08:52:34 +03:00 Authoring application: pdftk 1.44 - www.pdftk.com (via itext-paulo-155 (itextpdf.sf.net-lowagie.com))
MD5: 87c2274dfd926ccd29dd82fb99a8ac69 SHA-1: 7322a0c3610df77a7e7805d234e75dab42c6cdf8 SHA-256: 729eac91c7b8731110d9900bdb46f240418c2b3730c3b48c5c8495301a7b22c2
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs pointing to external PDF files, as indicated by the PDF_SEO_LINK_FARM heuristic. While no scripts were explicitly extracted, the ML_NYX_PDF_MALICIOUS heuristic and the sheer volume of external links suggest a malicious intent, possibly to manipulate search engine rankings or distribute further malware. The attack pattern is inferred from the link farm heuristic, and the IOCs are the primary external URLs found.

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/social-states-china-in-international-institutions-1980-2000-princeton-studies.pdf
    • http://www.gorillawalker.com/the-roman-remains-of-southern-france-a-guide-book.pdf
    • http://www.gorillawalker.com/hermeneutics-holography-and-indian-idealism-a-study-of-projection-and.pdf
    • http://www.gorillawalker.com/diseases-of-bluegrass-with-particular-reference-to-colorado-technical-bulletin.pdf
    • http://www.gorillawalker.com/this-bitch-ain-t-right.pdf
    • http://www.gorillawalker.com/the-harmony-of-the-world-chinese-poems.pdf
    • http://www.gorillawalker.com/quantum-philosophy.pdf
    • http://www.gorillawalker.com/bellah-v-whittlesey-u-s-supreme-court-transcript-of-record.pdf
    • http://www.gorillawalker.com/unhappy-soldier-hino-ashihei-and-japanese-world-war-ii-literature.pdf
    • http://www.gorillawalker.com/cenomanian-turonian-upper-cretaceous-stratigraphic-and-depositional-framework-new-mexico.pdf
    • http://www.gorillawalker.com/mccall-s-cooking-school-recipe-card-soups-7-gazpacho-replacement.pdf
    • http://www.gorillawalker.com/shadow-command.pdf
    • http://www.gorillawalker.com/the-blindfold-s-eyes-my-journey-from-torture-to-truth.pdf
    • http://www.gorillawalker.com/myanmar-country-map-burma-periplus-travel-maps-comprehensive-country-maps.pdf
    • http://www.gorillawalker.com/the-ransom-of-mercy-carter.pdf
    • http://www.gorillawalker.com/telar-t.pdf
    • http://www.gorillawalker.com/microbial-quality-assurance-in-pharmaceuticals-cosmetics-and-toiletries-gender-change.pdf
    • http://www.gorillawalker.com/national-minorities-in-putin-s-russia-diversity-and-assimilation-routledge.pdf
    • http://www.gorillawalker.com/green-eye-bandit.pdf
    • http://www.gorillawalker.com/classic-battletech-technical-readout-3026-the-succession-wars.pdf
    • http://www.gorillawalker.com/to-preserve-the-evidences-of-a-noble-past-an-administrative.pdf
    • http://www.gorillawalker.com/baby-s-world-shaped-board-bathtime-baby-s-world-shaped.pdf
    • http://www.gorillawalker.com/battle-for-ground-zero-inside-the-political-struggle-to-rebuild.pdf
    • http://www.gorillawalker.com/billy-walker-once-twice-three-times-a-winner-the-fa.pdf
    • http://www.gorillawalker.com/second-helpings-further-irish-adventures-with-food.pdf
    • http://www.gorillawalker.com/string-quartet-in-a-minor-set-of-parts.pdf
    • http://www.gorillawalker.com/computational-electrophysiology-a-first-course-in-in-silico-medicine-volume.pdf
    • http://www.gorillawalker.com/the-mafia-s-greatest-hits.pdf
    • http://www.gorillawalker.com/a-fundamental-fear-eurocentrism-and-the-emergence-of-islamism-zed.pdf
    • http://www.gorillawalker.com/hunter-book-defender-hunter-roleplaying-game.pdf
    • http://www.gorillawalker.com/the-victorian-church-vol-1-victorian-church-1829-1859-pt.pdf
    • http://www.gorillawalker.com/key-cases-eu-law.pdf
    • http://www.gorillawalker.com/race-and-racism-in-the-west-crusades-to-the-present.pdf
    • http://www.gorillawalker.com/pilgrimage-of-a-soul-contemplative-spirituality-for-the-active-life.pdf
    • http://www.gorillawalker.com/season-of-fear-cab-bolton-series-book-2.pdf
    • http://www.gorillawalker.com/hydrodynamics-around-cylindrical-structures-advanced-series-on-ocean-engineering-v.pdf
    • http://www.gorillawalker.com/hot-flat-and-crowded.pdf
    • http://www.gorillawalker.com/iso-23-1993-cinematography-camera-usage-of-35-mm-motion.pdf
    • http://www.gorillawalker.com/daughter-of-the-wind.pdf
    • http://www.gorillawalker.com/arranging-grief-sacred-time-and-the-body-in-nineteenth-century.pdf
    • 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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