Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f6b2bb6b9be3596…

MALICIOUS

PDF

78.7 KB Created: 2021-07-03 05:17:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6115fdd74900cfbd8e1e8bd1a609ee55 SHA-1: a129cca826824799af40b8b964da68cabbe98204 SHA-256: 0f6b2bb6b9be359664a7502c5b21b7ff804ab05817c2fa75ea7943759564610f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan-d2568dad23a94d95'. Heuristics indicate the presence of a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to redirect users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://studiotecnicolari.it/userfiles/files/jajulapodewaza.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/bqrhg0kk3h29rjsb2c8bhcsru1/58341633824.pdf
    • https://vidolamerica.org/wp-content/plugins/super-forms/uploads/php/files/9dd78119e550b9d8ed8b788e06fb60e7/41679207976.pdf
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec977bf1d2---togupexo.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076dbcbb4b1e---50671089682.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/b75cdf9f73e89b8fb6042d0bcf6877a9/sosiragod.pdf
    • http://ed-web.cz/userfilesfile/xotirujajumet.pdf
    • http://darec.sk/files/files/luwemapenovepetesodamunu.pdf
    • http://short-story.ru/upload/file/dosekujevu.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/f8ccbbeb3ed5910355d4f7889638629b/kesefudata.pdf
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/pqu27epcrquo9vfjqf156urd35/4837806203.pdf
    • http://annandale1963.com/clients/69704/File/josuratexezisadipokeji.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a18c51b3db2---fojusam.pdf
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a418ca58886---1256980241.pdf
    • http://uptownchantilly.com/uploads/files/30895864200.pdf
    • http://richmediahouse.com/admin/uploads/file/82531538289.pdf
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/4267436fd7f254ac965452374cb10265/torisifusoliketemav.pdf
    • http://czdashan.cn/uploadfile/file/2021050813451073499.pdf
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc0f5373e3---81151846466.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/3c7d5e9df11826ecff9fff6c73018c0e/82784595170.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a65d64b6437---71332691991.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160985513aa110---40682424776.pdf
    • http://28777886.com/Lpf/UPFILE/userfiles/files/nizozozusotilugom.pdf
    • https://www.isnb.co.uk/wp-content/plugins/super-forms/uploads/php/files/14df9564a24ae565a4610e91f2da6221/vixujavesuzobefe.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087fcc9b5570---99716248598.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=swipe+unlock+icon+to+use+call+options
    • https://forums.androidcentral.com/showthread.php?t=759106&s=72152185598f7ea7cac9d91a3b4e15e2
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://forums.androidcentral.com/showthread.php?t=759106&s=72152185598f7ea7cac9d91a3b4e15e2
    • 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/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d27a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27A 16792 bytes
font_01_sfnt_off0000ea8c.bin
8085f121880a39c4a57cdcca350e8a7a41fd2a04577f013eb78f23d6e997b508		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA8C 16272 bytes
font_02_sfnt_off000114d4.bin
a50dbfd9886c015b374a74bf71bd2166870a26c039b9fd8b0b6c88bd863424fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114D4 10620 bytes

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