Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6d341a443857207…

MALICIOUS

PDF

55.4 KB Created: 2021-02-26 13:31:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e92cde34b8dae5ce5536dd8724111887 SHA-1: 0bc9451cb3621bb7dddf49a3ca79b121fc84cb15 SHA-256: b6d341a443857207aa43a8d5ac52b1b0d3e8ee1dfc382dafb77e847bbb8a15b8
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, a common tactic for phishing or distributing malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest malicious intent, likely related to directing users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6277

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://ponafet.ru/award?keyword=separating+john+updike+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366008/normal_60331b2328383.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459791/normal_6033a3ae314cf.pdfIn PDF document text
    • http://mukoxadetovewo.66ghz.com/80475010928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497095/normal_60171da9b199c.pdfIn PDF document text
    • http://bavedibigilomit.66ghz.com/foxtel_espn_tv_guide_today.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447265/normal_602162dce4ec5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484821/normal_603497168e11f.pdfIn PDF document text
    • http://doporujela.iblogger.org/close_up_pics_level_9_all_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426955/normal_5fe0b94b00f7f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466411/normal_5ffbbc8fe3b58.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/hair_colour_changer_app_free.pdfIn PDF document text
    • http://vedebimefawimad.rf.gd/zoxase.pdfIn PDF document text
    • http://xagewojijakeri.rf.gd/93076952411.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/49827729439.pdfIn PDF document text

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