Malicious PDF — malware analysis report

Static analysis result for SHA-256 96e7df3ae207e2b4…

MALICIOUS

PDF

40.9 KB Created: 2020-03-28 10:30:16 +02:00 Authoring application: wkhtmltopdf 0.12.1.4 (via Qt 4.8.6)
MD5: 12c495d748d9421208eabbd1faf01e3b SHA-1: f5b31cd4fb70f5c63d621bdd305323409acf1c2d SHA-256: 96e7df3ae207e2b4bc80b76dde11c54169677b84e94f898189b990e60904b8b8
94 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a large number of external links, many of which point to other PDFs on different domains, indicating a link farm or SEO abuse tactic. The ML classifier strongly flagged this PDF as malicious. The document body text, though partially corrupted, contains a title related to language functions and references to wkhtmltopdf, suggesting it's a generated document designed to host these links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://thompsonstradingco.com/uploads/1/3/0/6/130604448/130604448.html#ejemplos+de+funcion+del+lenguaje+apelativa
    • http://supyogabrighton.co.uk/uploads/1/3/0/6/130605108/b10a9cefe7.pdf
    • http://jiayingguojiyule.br3h.com/uploads/1/3/0/6/130604359/4868204.pdf
    • http://mcilquham.net/uploads/1/3/0/2/130289243/3939425.pdf
    • http://tripsthereandback.com/uploads/1/3/0/5/130543065/damuvolozuturixi.pdf
    • http://transformingbodies.org/uploads/1/3/0/5/130540683/koralabosizud.pdf
    • http://nursinghomepj.com/uploads/1/3/0/3/130313316/datag.pdf
    • http://yukonprovisions.ca/uploads/1/3/0/5/130590203/6543278.pdf
    • http://marijuanaexchangemarket.com/uploads/1/3/0/6/130639546/5779581.pdf
    • http://boatinsurance.wales/uploads/1/3/0/8/130874253/5545550.pdf
    • http://oalkadi.com/uploads/1/3/0/4/130489410/dolim-kanozujijuma.pdf
    • http://nmtitlesolutions.com/uploads/1/3/0/3/130313316/9c8d498db.pdf
    • http://www.dailydrivenpower.com/uploads/1/3/0/6/130620268/ruxipowelavin-rovapumiko-wisibuxena-kixazazekuxo.pdf
    • http://compliancemanager.co.nz/uploads/1/3/0/6/130604856/fusapuxefakujejume.pdf
    • http://www.paulcoxon.co.uk/uploads/1/3/0/5/130590243/193c2ac0.pdf
    • http://www.varealtorsjblm.com/uploads/1/3/0/7/130776433/fopilodulapojap-mexotemog-rikaf-rimiviset.pdf
    • http://doctorforconcreteics.com/uploads/1/3/0/8/130814081/c2a93778d65.pdf
    • http://www.mc4.tech/uploads/1/3/0/9/130969759/gijera.pdf
    • http://styletransformations.com/uploads/1/3/0/7/130738969/fulirob-ruduniseguj-bewaxa.pdf
    • http://lillinflame.com/uploads/1/3/0/8/130813547/dekanesodupuf-razol-xoxotati.pdf
    • http://firstdesign.org/uploads/1/3/0/5/130551302/texamusiwedon-rumumekisonorun-wipotidorunem.pdf
    • http://hostmaster.georgiacrook.co.uk/uploads/1/3/0/4/130489465/pixogo.pdf
    • http://mocowv.net/uploads/1/3/0/8/130813992/bagorafaripuxa.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007494.bin
b7fc63b41151113a7843c1b0b1d17565bbcc0bf56674dfcb32d62279ec9d83c4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7494 8656 bytes

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