Malicious PDF — malware analysis report

Static analysis result for SHA-256 23e3c34dd3c7114a…

MALICIOUS

PDF

38.7 KB Created: 2021-09-28 00:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eab18798b1d4a2739f64e32cb5d59b94 SHA-1: 8989890e5a82ba486e71dbab8e5964f5a93d7935 SHA-256: 23e3c34dd3c7114a7dbd460a3b618f637d3fcca1616f67dc545d10dee7b80e4b
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing lure. The document's structure suggests it is image-only, designed to trick users into clicking a hidden action that redirects them to external URLs. These URLs are part of a link farm, indicating a phishing or malicious redirection campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=redmi+note+8+vs+redmi+9+prime
    • https://zemtechnika.lt/public/site/0files/rajiralobilowi.pdf
    • https://ichibaninfotech.com/ckfinder/userfiles/files/92358829762.pdf
    • https://tradingphrases.net/userfiles/files/dezofozaxefagojijexemiwub.pdf
    • http://winecellarkeeper.com/ckfinder/userfiles/files/metigegalodunutujilaseti.pdf
    • http://wksx.top/images/userfiles/file/vepizijiwozobetabejanoxu.pdf
    • http://fuzoku-kyujin.jp/ckfinder/userfiles/files/90861285086.pdf
    • http://tacchigroup.com/public/thread/risorse/file/76978748608.pdf
    • https://affordans.com/ckfinder/userfiles/files/fobufomunipujaw.pdf
    • http://smeeing.com/userfiles/files/lixojuwi.pdf
    • http://lngpetro.com/userfiles/file/71095516533.pdf
    • http://cementfeet.com/userfiles/file/depabuxisedajoxavaronidu.pdf
    • https://washlounge.in/ckfinder/userfiles/files/xanegapam.pdf
    • http://pospatrans.cz/UserFiles/File/11038297866.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/2bd1308852a86472ef1c716a2ceaec5d/relanatovori.pdf
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16148196722932---64575241300.pdf

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