Malicious PDF — malware analysis report

Static analysis result for SHA-256 42b4067090f81b7b…

MALICIOUS

PDF

43.9 KB Created: 2018-11-23 21:33:12 +03:00 Authoring application: Microsoft Word (via Mac OS X 10.6.8 Quartz PDFContext)
MD5: e6256788a1c793d7f3d7ca07dac1daf4 SHA-1: 919e740d1be688bb7448761e6767073d8da12ef3 SHA-256: 42b4067090f81b7b0b625eaa2dd91e8bf1cd8a61a6711946a2e870e1453f4a67
150 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Dropper.Agent-7254834-0 and a machine learning classifier indicated a high probability of maliciousness. The primary heuristic identified a link farm of 32 external PDF URLs hosted on www.gorillawalker.com, suggesting a content-luring or redirection mechanism. No scripts were extracted, but the structure and heuristic firings strongly indicate a dropper or downloader functionality.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9171

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7254834-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7254834-0
  • 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/eat-me-vintage-blue.pdf
    • http://www.gorillawalker.com/aleksander-griboedov-s-woe-from-wit-a-commentary-and-translation.pdf
    • http://www.gorillawalker.com/lonely-planet-sri-lanka-country-travel-guide.pdf
    • http://www.gorillawalker.com/spying-to-stone-weight-digital-concordance-book-85-digital-concordance.pdf
    • http://www.gorillawalker.com/man-midwifery-exposed-or-the-danger-and-immorality-of-employing.pdf
    • http://www.gorillawalker.com/adobe-robohelp-html-10-the-essentials-kindle-edition.pdf
    • http://www.gorillawalker.com/something-in-the-stars.pdf
    • http://www.gorillawalker.com/pattern-recognition-fourth-edition.pdf
    • http://www.gorillawalker.com/fundamental-legal-conceptions-as-applied-in-judicial-reasoning-and-other.pdf
    • http://www.gorillawalker.com/letts-wild-about-151-english-age-7-8-letts-wild.pdf
    • http://www.gorillawalker.com/welding-metallurgy-of-stainless-and-heat-resisting-steels.pdf
    • http://www.gorillawalker.com/the-eye-of-odin-the-raiders-of-folklore-book-1.pdf
    • http://www.gorillawalker.com/intellectual-property-licensing-strategies-2012-ed-leading-lawyers-on-analyzing.pdf
    • http://www.gorillawalker.com/wallpaper-city-guide-milan-2012.pdf
    • http://www.gorillawalker.com/development-of-lds-temple-worship-1846-2000-a-documentary-history.pdf
    • http://www.gorillawalker.com/the-food-of-spain.pdf
    • http://www.gorillawalker.com/brick-buy-brick-book-ten-business-planning-for-the-property.pdf
    • http://www.gorillawalker.com/essentials-of-veterinary-anatomy-physiology-1e-1st-first-edition-by.pdf
    • http://www.gorillawalker.com/the-proposition-5-the-ferro-family-the-proposition-the-ferro.pdf
    • http://www.gorillawalker.com/posterior-cruciate-ligament-injuries-a-practical-guide-to-management.pdf
    • http://www.gorillawalker.com/medical-assisting-administrative-and-clinical-competencies-medical-assisting-administrative-clin.pdf
    • http://www.gorillawalker.com/historias-de-la-argentina-spanish-edition.pdf
    • http://www.gorillawalker.com/an-arrangement-of-three.pdf
    • http://www.gorillawalker.com/the-odyssey-a-dramatic-retelling-of-homer-s-epic.pdf
    • http://www.gorillawalker.com/french-canadians-furs-and-indigenous-women-in-the-making-of.pdf
    • http://www.gorillawalker.com/caring-is-creepy.pdf
    • http://www.gorillawalker.com/donald-thomson-in-arnhem-land.pdf
    • http://www.gorillawalker.com/wileman-a-collectors-guide.pdf
    • http://www.gorillawalker.com/online-privacy-an-introduction-to-tor-network-and-online-security.pdf
    • http://www.gorillawalker.com/solaris-10-zfs-essentials.pdf
    • http://www.gorillawalker.com/his-excellency-the-marquis-of-lorne-governor-general-of-canada.pdf
    • http://www.gorillawalker.com/martin-luther-king-jr-we-shall-overcome-african-american-biographies.pdf
    • http://www.gorillawalker.com/how-to-be-danish-a-journey-to-the-cultural-heart.pdf
    • http://www.gorillawalker.com/are-we-there-yet-perfect-family-vacations-and-other-fantasies.pdf
    • http://www.gorillawalker.com/jugendkultur-1940-1985-german-edition.pdf
    • http://www.gorillawalker.com/geochemical-and-hydrological-reactivity-of-heavy-metals-in-soils.pdf
    • http://www.gorillawalker.com/children-books-the-world-and-i-children-book-global-warming.pdf
    • http://www.gorillawalker.com/the-one-pound-gospel-1-spanish-edition.pdf
    • http://www.gorillawalker.com/introduction-to-supply-chain-management.pdf
    • http://www.gorillawalker.com/why-you-don-t-want-to-lose-weight-how-one.pdf
    • http://www.gorillawalker.com/fundamental-legal-conceptions-as-applied-in-judicial-reasonin
    • 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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