Malicious PDF — malware analysis report

Static analysis result for SHA-256 3156c4b7e0f4905d…

MALICIOUS

PDF

70.6 KB Created: 2021-09-22 18:30:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f560f9f12dbd02e6d8e0b73d7dc3ff10 SHA-1: 95791200e87738b3d00b3e9f652ab88c9dac0f66 SHA-256: 3156c4b7e0f4905d1d45ef56f6d99b62c58a80fceb3927690393f773ae3f6b81
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. One prominent URL, 'https://archism.ru/uplcv?utm_term=gun+game+download+3d', suggests a lure for downloading a game. The ML classifier and ClamAV detection indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6693

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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 https://archism.ru/uplcv?utm_term=gun+game+download+3d
    • http://keitbg.com/images/files/57053195219.pdf
    • http://morethancars.nl/uploads/edytor/file/kubeked.pdf
    • http://ngocphuocjsc.com/public/default/ckeditor/files/kavofutafujebof.pdf
    • http://jplus-ag.com/upload/files/BodyFile__61354500A0400.pdf
    • http://22vek-omsk.ru/fck_editor_files/files/xevekatojowutanoviduk.pdf
    • https://tcremich.lu/files/files/168693245.pdf
    • http://www.impactit.in/ckfinder/userfiles/files/58368154162.pdf
    • http://pathtojanna.com/userfiles/files/xibiloleli.pdf
    • http://opusbiz.kr/data/editor/file/1979030969614a1c9912612.pdf
    • http://ettermanenterprises.com/ckfinder/userfiles/files/82531451356.pdf
    • http://futimisdev.com/userfiles/file/sitikujufafu.pdf
    • https://thietbivesinhanhhuy.com/asset/files/49942105278.pdf
    • http://cnkls.com/userfiles/file/1631845521.pdf
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/a5hsktn5tr90cdq6veh46bvs30/1136401725.pdf
    • https://worldpigment.com/image/upload/File/kowawugiwosutovolexipawax.pdf
    • http://toitureetfacade.fr/data/Files/62151468589.pdf
    • http://svadbavmoskve.com/content/xuploadimages/file/13835618736.pdf
    • https://brakos.it/file/72570867835.pdf
    • https://equalitas.es/userfiles/file/71953733506.pdf
    • https://worldpigment.com/image/upload/File/11552898587.pdf
    • https://dursunguney.com/userfiles/files/15663991926.pdf
    • https://karjerastests.bankai.lv/ckfinder/userfiles/files/77438845823.pdf
    • http://fmmvn.net/userfiles/files/18946686583.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa23.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFA23 16792 bytes