Malicious PDF — malware analysis report

Static analysis result for SHA-256 a031599093ced110…

MALICIOUS

PDF

46.4 KB Created: 2019-02-14 08:26:50 +03:00 Authoring application: C2 v4.2.0220 build 670 - c2_rendition_config : Techlit_Active (via Acrobat Distiller 10.0.0 (Windows); modified using iText 2.1.7 by 1T3XT)
MD5: 2d57b45228b2bd6d288a51b2ed2fda75 SHA-1: 4776b96aae0e3dc440d5a9448f3fe0433b282153 SHA-256: a031599093ced110e136b9338d6b15823744287210de85d14755cf1514d793ad
90 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a large number of embedded external links, indicating a potential SEO manipulation or content hosting scheme. The primary heuristic identified a 'PDF_SEO_LINK_FARM' with 32 external links, predominantly hosted on 'www.gorillawalker.com'. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure or payload delivery mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8144

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/robust-estimation-and-failure-detection-a-concise-treatment-advances-in.pdf
    • http://www.gorillawalker.com/voice-over-lte-volte.pdf
    • http://www.gorillawalker.com/ghost-train-spirals.pdf
    • http://www.gorillawalker.com/geography-163x-geography-of-nebraska-correspondence-study-series.pdf
    • http://www.gorillawalker.com/palm-trees.pdf
    • http://www.gorillawalker.com/waltons-beginner-s-harmonica-book.pdf
    • http://www.gorillawalker.com/dairy-hollow-house-soup-bread-cookbook.pdf
    • http://www.gorillawalker.com/advanced-facilitation-strategies-tools-and-techniques-to-master-difficult-situations.pdf
    • http://www.gorillawalker.com/i-polis-i-and-personification-in-classical-athenian-art-monumenta.pdf
    • http://www.gorillawalker.com/passtrak-health-insurance-license-exam-manual-passtrak-unnumbered.pdf
    • http://www.gorillawalker.com/tenth-international-conference-on-road-transport-information-and-control-conference.pdf
    • http://www.gorillawalker.com/the-sailor-s-book-of-small-cruising-sailboats-reviews-and.pdf
    • http://www.gorillawalker.com/3-dances-trumpet-1-in-b-flat.pdf
    • http://www.gorillawalker.com/inventing-kindergarten.pdf
    • http://www.gorillawalker.com/757-767-pilot-handbook-simulator-and-checkride-procedures-airlinr-training.pdf
    • http://www.gorillawalker.com/maryland-s-vanishing-lives-maryland-paperback-bookshelf-s.pdf
    • http://www.gorillawalker.com/few-at-high-risk-get-hepatitis-b-vaccine-national-survey.pdf
    • http://www.gorillawalker.com/inside-the-lebanese-confessional-mind.pdf
    • http://www.gorillawalker.com/the-pocket-oxford-duden-german-dictionary.pdf
    • http://www.gorillawalker.com/rubio-the-legend-ben-blue.pdf
    • http://www.gorillawalker.com/schaum-s-outline-of-business-statistics-fourth-edition-schaum-s.pdf
    • http://www.gorillawalker.com/heartburn-solved-how-to-reverse-acid-reflux-and-gerd-naturally.pdf
    • http://www.gorillawalker.com/american-indian-stories-native-american.pdf
    • http://www.gorillawalker.com/after-life-the-real-truth-about-heaven-and-hell-kindle.pdf
    • http://www.gorillawalker.com/contemporary-indian-poetry-in-english-indian-literatures-in-the-fifth.pdf
    • http://www.gorillawalker.com/lighting-for-product-photography-the-digital-photographer-s-step-by.pdf
    • http://www.gorillawalker.com/mel-bay-play-electric-bass-from-chord-symbols.pdf
    • http://www.gorillawalker.com/constructing-the-self-constructing-america.pdf
    • http://www.gorillawalker.com/black-and-asian-theatre-in-britain-a-history.pdf
    • http://www.gorillawalker.com/the-international-free-and-open-source-software-law-book.pdf
    • http://www.gorillawalker.com/menorca-landscapes-series.pdf
    • http://www.gorillawalker.com/latin-american-cinema-today-the-directors-perspective.pdf
    • http://www.gorillawalker.com/mercy-sparx-volume-2-4-mercy-sparx-volume-2-4.pdf
    • http://www.gorillawalker.com/finding-moonshine-a-mathematician-s-journey-through-symmetry-by-marcus.pdf
    • http://www.gorillawalker.com/grey-butler-kindle-edition.pdf
    • http://www.gorillawalker.com/the-modlin-center-2002-2003-season-the-very-best-in.pdf
    • http://www.gorillawalker.com/mechanics-of-coastal-sediment-transport-advanced-series-in-ocean-engineering.pdf
    • http://www.gorillawalker.com/love-without-lies-a-guide-to-true-and-lasting-intimacy.pdf
    • http://www.gorillawalker.com/remains-of-ritual-northern-gods-in-a-southern-land-chicago.pdf
    • http://www.gorillawalker.com/consumer-credit-management-system-experimental-applied-economics-and-management-colleges.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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