Malicious PDF — malware analysis report

Static analysis result for SHA-256 33906e475a6f6924…

MALICIOUS

PDF

44.0 KB Created: 2018-12-07 18:29:47 +03:00 Authoring application: pdftk 1.44 - www.pdftk.com (via itext-paulo-155 (itextpdf.sf.net-lowagie.com))
MD5: 3e407cb23c4dea40348871e8ff9889bd SHA-1: 6796a29a8efe7f6a40c0f25e9793a0129fc0ad9f SHA-256: 33906e475a6f69240cb97e76f41bb06adcc5db72bb133cbf13f07ecad7372a42
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a large number of embedded URLs pointing to other PDF files on the domain 'gorillawalker.com'. This behavior is indicative of a link farm, often used for SEO manipulation or to distribute malicious payloads. The ML classifier also flagged this PDF as malicious. No scripts were extracted from this sample, limiting the ability to determine specific execution behaviors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8683

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/experimental-statistics-for-agriculture-and-horticulture-modular-texts-series.pdf
    • http://www.gorillawalker.com/bird-and-rabbit-rosen-real-readers-stem-and-steam-collection.pdf
    • http://www.gorillawalker.com/rulers-of-evil-useful-knowledge-about-governing-bodies.pdf
    • http://www.gorillawalker.com/jack-and-jim-picture-book.pdf
    • http://www.gorillawalker.com/keiko-abe-a-virtuosic-life-her-musical-career-and-the.pdf
    • http://www.gorillawalker.com/girls-will-be-girls-dressing-up-playing-parts-and-daring.pdf
    • http://www.gorillawalker.com/are-all-snake-bites-harmful-do-snake-bites-heal-ok.pdf
    • http://www.gorillawalker.com/purple-stalks-grey-moss.pdf
    • http://www.gorillawalker.com/student-solutions-manual-single-variable-for-calculus-early-transcendentals.pdf
    • http://www.gorillawalker.com/areopagitica-freedom-of-the-press-little-humanist-classics.pdf
    • http://www.gorillawalker.com/m-m-f-a-bisexual-mmf-threesome-bundle-m-m.pdf
    • http://www.gorillawalker.com/the-earliest-christian-artifacts-manuscripts-and-christian-origins.pdf
    • http://www.gorillawalker.com/we-mean-business-japanese-for-business-people.pdf
    • http://www.gorillawalker.com/the-impersonal-sublime-hugo-baudelaire-lautreamont.pdf
    • http://www.gorillawalker.com/subterranean-structures-and-mycotrophy-of-the-achlorophyllous-dictyostega-orobanchoides-burmanniaceae.pdf
    • http://www.gorillawalker.com/by-dk-publishing-dk-eyewitness-travel-guide-austria-revised-paperback.pdf
    • http://www.gorillawalker.com/cy-twombly-paradise.pdf
    • http://www.gorillawalker.com/aladdin-and-the-lamp-must-know-stories-level-2.pdf
    • http://www.gorillawalker.com/the-dorito-effect-the-surprising-new-truth-about-food-and.pdf
    • http://www.gorillawalker.com/human-rights-and-the-third-world-issues-and-discourses.pdf
    • http://www.gorillawalker.com/huntington-s-disease-the-facts.pdf
    • http://www.gorillawalker.com/elements-of-compressible-flow.pdf
    • http://www.gorillawalker.com/rutas-de-argentina-01-con-chile-completo-spanish-edition.pdf
    • http://www.gorillawalker.com/compass-american-guides-las-vegas.pdf
    • http://www.gorillawalker.com/bessarabia-and-bukovina.pdf
    • http://www.gorillawalker.com/trouble-at-durbenford-d20-generic-system.pdf
    • http://www.gorillawalker.com/et-in-terra-pax-satb-choir-vocal-music-score-with.pdf
    • http://www.gorillawalker.com/the-herbalist-s-daughter-book-1-amish-herb-shop-series.pdf
    • http://www.gorillawalker.com/six-armies-in-normandy-from-d-day-to-the-liberation.pdf
    • http://www.gorillawalker.com/the-study-skills-guide-elite-students-series.pdf
    • http://www.gorillawalker.com/canope-prelude-4-study-score-faber-edition-claude-debussy-preludes.pdf
    • http://www.gorillawalker.com/incredible-victory-the-battle-of-midway-classics-of-war.pdf
    • http://www.gorillawalker.com/the-relationship-between-the-physical-and-the-moral-in-man.pdf
    • http://www.gorillawalker.com/short-studies-on-great-subjects.pdf
    • http://www.gorillawalker.com/career-opportunities-in-the-music-industry-out-of-print.pdf
    • http://www.gorillawalker.com/the-vault-guide-to-finance-interviews.pdf
    • http://www.gorillawalker.com/harry-s-truman-our-thirty-third-president-presidents-of-the.pdf
    • http://www.gorillawalker.com/concise-guide-to-information-literacy.pdf
    • http://www.gorillawalker.com/greatness-of-our-god-perpetual-2010-perpetual-calendar.pdf
    • http://www.gorillawalker.com/temporary-shepherds-a-congregational-handbook-for-interim-ministry.pdf
    • http://www.gorillawalker.com/girls-will-be-girls-dressin
    • 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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