Malicious PDF — malware analysis report

Static analysis result for SHA-256 3fce537c70446315…

MALICIOUS

PDF

42.3 KB Created: 2019-02-13 20:55:18 +03:00 Authoring application: - (via Haru Free PDF Library 2.1.0)
MD5: 6ba190ae395c03ae2da06ae24b978b59 SHA-1: 680f61ab3edcdb065a549f0975e215f559480a83 SHA-256: 3fce537c70446315618d18e98592347188a6fb995990a15ca2bfe8ef69d61c44
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for containing a large number of external links, specifically a link farm. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains numerous URLs pointing to PDFs on the domain 'gorillawalker.com'. This suggests the primary purpose is to redirect users to a large collection of external documents, likely for SEO manipulation or to serve as a distribution point for other malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9027

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/turbo-coding-for-satellite-and-wireless-communications-the-springer-international.pdf
    • http://www.gorillawalker.com/essential-atlas-of-technology.pdf
    • http://www.gorillawalker.com/gousha-atlanta-ga-metro-folded-map.pdf
    • http://www.gorillawalker.com/kingdom-of-summer.pdf
    • http://www.gorillawalker.com/ethics-crime-and-criminal-justice.pdf
    • http://www.gorillawalker.com/sports-betting-winning-systems-kindle-edition.pdf
    • http://www.gorillawalker.com/the-arab-israeli-conflict-the-1948-war-essential-histories-war.pdf
    • http://www.gorillawalker.com/omg-so-tight-the-ultimate-collection-of-forbidden-first-times.pdf
    • http://www.gorillawalker.com/the-music-of-spain.pdf
    • http://www.gorillawalker.com/smart-working-creating-the-next-wave.pdf
    • http://www.gorillawalker.com/html-javascript-programming-concepts-computer-applications-series.pdf
    • http://www.gorillawalker.com/militant-islam-a-sociology-of-characteristics-causes-and-consequences.pdf
    • http://www.gorillawalker.com/thomas-hardy-bloom-s-modern-critical-views.pdf
    • http://www.gorillawalker.com/bernard-meyer-s-east-coast-cuisine-regional-cooking-with-french.pdf
    • http://www.gorillawalker.com/the-collector-s-encyclopedia-of-dolls-vol-1.pdf
    • http://www.gorillawalker.com/introduction-to-fire-protection-and-emergency-services.pdf
    • http://www.gorillawalker.com/around-the-world-with-lbj-my-wild-ride-as-air.pdf
    • http://www.gorillawalker.com/500-wok-recipes-sensational-stir-fries-from-around-the-world.pdf
    • http://www.gorillawalker.com/22-days-in-spain-and-portugal-the-itinerary-planner-jmp.pdf
    • http://www.gorillawalker.com/angiotensin-converting-enzyme-inhibitors.pdf
    • http://www.gorillawalker.com/watson-and-holmes-volume-2.pdf
    • http://www.gorillawalker.com/taming-val-the-romanovsky-brothers-book-1.pdf
    • http://www.gorillawalker.com/a-lady-of-good-family-a-novel.pdf
    • http://www.gorillawalker.com/vocabulary-level-a-student-worktext.pdf
    • http://www.gorillawalker.com/dirt-readers-for-writers.pdf
    • http://www.gorillawalker.com/holy-marriage.pdf
    • http://www.gorillawalker.com/broadway-hits-for-tenor-sax-instrumental-play-along-book-cd.pdf
    • http://www.gorillawalker.com/international-tourism-and-hospitality-in-the-digital-age-hardcover.pdf
    • http://www.gorillawalker.com/bmw-alpina-crowood-autoclassics.pdf
    • http://www.gorillawalker.com/the-grinds-of-the-times-neisha-presents-cass-nico-presents.pdf
    • http://www.gorillawalker.com/the-great-barrier-reef-a-journey-through-the-world-s.pdf
    • http://www.gorillawalker.com/alone-again-naturally-sheet-music.pdf
    • http://www.gorillawalker.com/so-you-want-to-go-into-the-theatre.pdf
    • http://www.gorillawalker.com/a-catalog-of-plants-in-the-plant-science-instructional-arboretum.pdf
    • http://www.gorillawalker.com/el-sonambulo-the-somnambulist-spanish-edition.pdf
    • http://www.gorillawalker.com/the-origin-of-biodiversity-in-insects-phylogenetic-tests-of-evolutionary.pdf
    • http://www.gorillawalker.com/dirty-dining.pdf
    • http://www.gorillawalker.com/maneras-de-amar-spanish-edition.pdf
    • http://www.gorillawalker.com/how-to-find-health-information-on-the-internet.pdf
    • http://www.gorillawalker.com/land-subsidence-analysis-in-urban-areas-the-bangkok-metropolitan-area.pdf
    • http://www.gorillawalker.com/the-arab-israeli-conflict-the-1948-wa
    • 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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