Malicious PDF — malware analysis report

Static analysis result for SHA-256 e657f9e5499ee15a…

MALICIOUS

PDF

39.9 KB Created: 2021-09-28 06:20:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d49175a5b49a595a9164a6547d737168 SHA-1: 9d27e10fff71c41011c6784205a0537d7e5de225 SHA-256: e657f9e5499ee15a4448027bebc995de98fd1bf8611679f131563a121511b792
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically identified as a phishing trojan. Heuristics indicate it functions as a link farm, with multiple embedded URLs pointing to potentially malicious PDF files hosted on various domains. The presence of PDF_SEO_DISPOSABLE_LINK_FARM suggests a deliberate attempt to obscure the true malicious destination by using numerous small, distinct domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7834

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://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/kawidakinowoguve.pdf In PDF document text
    • http://notariocprietoa.com/notaria/documentos/files/toligakuwu.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/larivira.pdfIn PDF document text
    • http://splogservice.ru/content/files/verilogub.pdfIn PDF document text
    • http://mywayrtk.info/userfiles/file/51069253055.pdfIn PDF document text
    • http://www.museopizarra.com/ckfinder/userfiles/files/37601650295.pdfIn PDF document text
    • https://avela.md/userfiles/file/20774005175.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147ac8529360---gumixiripediwurujix.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/jaruvexatunizigivijomupug.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/relewafujexegofejag.pdfIn PDF document text
    • http://hermandadperdon.es/userfiles/file/77032379611.pdfIn PDF document text
    • https://snapstudios.ca/userfiles/file/20122385020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=n+track+studio+pro+apk+androidPDF link annotation

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