Malicious PDF — malware analysis report

Static analysis result for SHA-256 140569fd3fd9371e…

MALICIOUS

PDF

38.1 KB Created: 2021-09-25 19:48:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8889efdda24aaa4aa14dd64e58aa1691 SHA-1: 37becae633b6af0431923509a09ae441123db5cb SHA-256: 140569fd3fd9371e9164c8fc083b7176948370576f45b2f4f7840d4a0cf563f1
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and an ML classifier. It functions as a screenshot lure, containing minimal text and a single image, typical of phishing attempts. The document embeds multiple external URIs hosted on disposable domains, suggesting it is part of a link farm designed to redirect users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8144

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://smidgel.ru/uplcv?utm_term=the+virtuoso+streaming+vf
    • http://vangphutai.com/images/uploads/files/44287088951.pdf
    • http://chiengthai.com/file_media/file_image/file/pozoti.pdf
    • http://www.hkrns.org.hk/ckfinder/userfiles/files/16468254538.pdf
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/897a6d9bcadca1bf76b62d5daa75f130/xazupozerufajifadoj.pdf
    • http://mocphatreal.com/assets/images/ckfinder/files/11324084180.pdf
    • https://bachson.net/upload/file/goxufirojibiluvetuw.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6b288a2f1---xitanudelefejujubigekati.pdf
    • http://svenskafik.se/uploads/fckeditor/file/28198297673.pdf
    • http://istihdamhaberleri.com/upload/ckfinder/files/86905725489.pdf
    • http://schokoladenfontaene.de/idata/pumerixowuziwet.pdf
    • http://cadelupo.it/userfiles/files/86532339196.pdf
    • http://www.rannatennis.ee/data/upfiles/files/dinuradejunotaxilenif.pdf

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