Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2f7dc12b041c427…

MALICIOUS

PDF

38.7 KB Created: 2021-10-09 07:19:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 92f2a73e4cf9a9aa54070b28d83b398f SHA-1: 19128e0f47451141fef57f17df244d5807be59f3 SHA-256: a2f7dc12b041c4270c168b196acf20873420d5b3e0a9b363899bf29b67d8e69c
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot used to conceal clickable links. Heuristics indicate it functions as a link farm on disposable hosting, directing users to external URLs. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to trick users into downloading further malware or visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8662

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://chcial.ru/uplcv?utm_term=insanity+workout+utorrent PDF link annotation
    • http://mlead.net/images/e/file/30566874720.pdfIn PDF document text
    • http://www.sudeshnamaulik.com/fckimages/file/87576723894.pdfIn PDF document text
    • https://evrenmentese.com/upload/ckfinder/files/59077525794.pdfIn PDF document text
    • https://millvalley.com/wysiwygfiles/file/nudosajotivazepe.pdfIn PDF document text
    • https://isleo.com/i_photos/file/wupezegigefulegebefeweguf.pdfIn PDF document text
    • http://www.miyadenthai.com/image/upload/File/tabapisebogugomiroriba.pdfIn PDF document text
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/dugibugoxawerij.pdfIn PDF document text
    • http://emblem4home.com/UserFiles/Member/File/disukemisenugalelezazozax.pdfIn PDF document text
    • http://www.detskaoptika.cz/ckfinder/userfiles/files/xudevozadifawefimokawidak.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/08q4qkqndndn914vs25o243re2/pavolododikejogozoxa.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/besatotewaxipevokave.pdfIn PDF document text
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/kobadixifunuxonexugeku.pdfIn PDF document text
    • http://saint-party.com/media/file/8348923510.pdfIn PDF document text
    • https://akconta.com/uploads/files/28675084519.pdfIn PDF document text
    • http://reanda.com/jingkelun/userfiles/files/20210905130201.pdfIn PDF document text

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