Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a3fd15677146932…

MALICIOUS

PDF

96.0 KB Created: 2021-10-07 02:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: e52ff2688ffa74377711f54910c18c95 SHA-1: df27dba281ddff3c028b66006da14a9f05e4c2be SHA-256: 5a3fd15677146932462816783870b06dafae60a94a6a6e7e5e815c911818a538
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, with heuristics indicating it functions as a link farm on disposable hosting. The primary purpose appears to be directing users to potentially malicious websites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6259

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=stephanie+mcmahon+and+brie+bella PDF link annotation
    • http://idealhca.com/admin/images/file/kusejefuriz.pdfIn PDF document text
    • https://incense888.com/uploads/files/202109080352038248.pdfIn PDF document text
    • https://phnews.ro/files/file/jajibisasaziwisegawala.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/62525799261.pdfIn PDF document text
    • https://amigo-shop.105h.net/upload/files/vajexesisikomidofuwedom.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16147386588067---wokumasanatigam.pdfIn PDF document text
    • http://sbstroy53.ru/img/files/30638183215.pdfIn PDF document text
    • http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/ebbcc29ba84cd23cdfa2227ff4cde980/dovonedesefubatajeg.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/bujikobamaforiwibabino.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/52242320795.pdfIn PDF document text
    • https://habibitours.org/ckfinder/In PDF document text

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