Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe9baaaff64ff52…

MALICIOUS

PDF

50.1 KB Created: 2021-06-03 02:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f8762c3c89edc5a70af0b952a4475d55 SHA-1: ef810522f2b7846eeac97621002db008a066afa3 SHA-256: cbe9baaaff64ff52efd1187752055b229a7d7589c89e1cd85338124acaee30b7
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7995

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://chcial.ru/pbw?utm_term=vivaldi+concerto+in+a+minor+3rd+movement+sheet+music PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5fdf2f922a8c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387577/normal_6064516123342.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387816/normal_5fe4c7fa3248e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416671/normal_5ff9c94799b2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444378/normal_60b7fe098b361.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_603797b2f2370.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415334/normal_603e07ea5bd1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459916/normal_606e6dbc9fc24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_600aed680748c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470391/normal_600965d9eb7a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414488/normal_60205ea800c6e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388835/normal_606ac9450162b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4473384/normal_60b086cf49c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459059/normal_606c9d0e70859.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366645/normal_601effaf0af75.pdfIn PDF document text
    • http://pusavivo.pbworks.com/f/papazarojiwa.pdfIn PDF document text
    • http://juvupumanut.pbworks.com/w/file/fetch/144493773/manual_para_extensiones_de_pestaas.pdfIn PDF document text
    • http://zeratuwolima.pbworks.com/w/file/fetch/144532494/diberuzudusezemaruni.pdfIn PDF document text
    • http://xodelow.pbworks.com/f/kingsborough_early_college_secondary.pdfIn PDF document text
    • http://kunixove.pbworks.com/f/virtual_life_simulation_games_online_free_unblocked.pdfIn PDF document text
    • http://kivupored.pbworks.com/f/nice_guys_movie_trailer.pdfIn PDF document text
    • http://wijozuzapusa.pbworks.com/f/40236740534.pdfIn PDF document text
    • http://sazupamufode.pbworks.com/w/file/fetch/144447495/kajil.pdfIn PDF document text
    • http://guronavageba.pbworks.com/f/javigisamimudogamuzed.pdfIn PDF document text