Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef359c3384c18c3a…

MALICIOUS

PDF

48.8 KB Created: 2021-09-10 01:58:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: c13f39e6ebfdd970ef2bac804a040e30 SHA-1: e92be6a5587177281586a58f2cac77cc87e1de74 SHA-256: ef359c3384c18c3a0dea6d3a629414cd2109a44eee4205239f7844ef1773eda5
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to potentially disposable domains and are structured as link farms, suggesting a phishing or credential harvesting campaign. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7448

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 http://changjiujz.com/uploads/files/202109010919388394.pdf In PDF document text
    • http://www.smartusb.info/images/library/File/falewipezonobozaguze.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/76789300487.pdfIn PDF document text
    • https://afgventuregroup.com/cfiles/file/83343099233.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/pozodubinadal.pdfIn PDF document text
    • http://reklamaopole.pl/userfiles/file/repobij.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/16793837010.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/71244656779.pdfIn PDF document text
    • http://synergienetwork.net/userfiles/file/21560196041.pdfIn PDF document text
    • http://td-mg.ru/uploads/files/82579869970.pdfIn PDF document text
    • http://htygroup.com/upload/files/vizurorezu.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/37739756946.pdfIn PDF document text
    • http://kxqcgs.net/filespath/files/20210907091659.pdfIn PDF document text
    • http://elhammagazine.com/ckfinder/userfiles/files/77849804166.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/wovudojetozi.pdfIn PDF document text
    • http://bananamusic.tw/uploads/files/202109071237185419.pdfIn PDF document text
    • http://p-itos.net/admin/userfile/image/file/sidibimegi.pdfIn PDF document text
    • http://artanuji.ge/admin/ckeditor/ckfinder/userfiles/files/nomupukidenivadalagomusox.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/kegerorusepesutalu.pdfIn PDF document text
    • http://christopherdallo.com/file/subopepixu.pdfIn PDF document text
    • http://dreesmann-foto.de/userfiles/file/95193406599.pdfIn PDF document text
    • https://editionsitaliques.com/userfiles/file/86897797266.pdfIn PDF document text
    • https://stealthwindow.tw/uploads/files/202109052111514489.pdfIn PDF document text
    • https://chambres-lannion.fr/userfiles/file/97672114558.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=what+is+the+best+song+download+appPDF link annotation

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