Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6eb91041044af55…

MALICIOUS

PDF

46.8 KB Created: 2021-09-20 21:04:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 46027b7b7ead2b11517046a18d30196b SHA-1: 1f8b28f9d1813e5dd7cf95e9d9eb3ca27635b070 SHA-256: c6eb91041044af5563162f7fcbb4d48a9df58a7c112d1f9f9beb3618c1b57f96
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, suggesting it's designed to redirect users to potentially harmful websites. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6955

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://medvor.ru/uplcv?utm_term=what+is+cloud+storage+for+android PDF link annotation
    • http://nuestratierrapremios.com/campannas/file/vupesuxamewet.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/161345e0b2cf03---40721158603.pdfIn PDF document text
    • http://jjw-led.com/userfiles/file/puresogupudebubewusaj.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/japefabadoxiforuzonuseb.pdfIn PDF document text
    • https://otoform.com/upload/ckfinder/files/pusalomamawarim.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/161403847a2f04---35855986544.pdfIn PDF document text
    • https://dadesigning.com/daduserfiles/files/14833132987.pdfIn PDF document text
    • http://johndanton.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/tutaro.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/db662513a6d2710f2c17aa4d8937e8ad/96233787254.pdfIn PDF document text
    • https://fallahi-sch.com/userfiles/file/3612635464.pdfIn PDF document text
    • http://otestmanager.com/club/data/userfiles/file/20210918114336.pdfIn PDF document text

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