Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bab34d9a7fa3c3e…

MALICIOUS

PDF

48.0 KB Created: 2021-03-27 11:58:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d33c3671f540761dd0b1b672f2c5c752 SHA-1: 050316941cfb2fe01fb26f9eb048bc68a8933435 SHA-256: 4bab34d9a7fa3c3edb717dbc238f7f19e733cda4859d4253deeb2463a6d057fd
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 0.6405

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://kuzutuzo.ru/strik?utm_term=maytag+2000+series+dryer+reviews PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4413242/normal_602db19556ece.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454289/normal_5ff8b7f0654ba.pdfIn PDF document text
    • http://profmaster74.ru/5018557102vw426.pdfIn PDF document text
    • http://kkkirrreeee.space/nafusunifizulepelumq1dj9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495399/normal_5fd087fc62bd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420930/normal_6056e4441cef0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_602dca20c2ee2.pdfIn PDF document text
    • http://umniashka.ru/176579618278aidp.pdfIn PDF document text
    • http://meetly.space/75928031817nkd5v.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499309/normal_60482ce1c9131.pdfIn PDF document text
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    • https://static.s123-cdn-static.com/uploads/4478415/normal_5fefa9c30c33a.pdfIn PDF document text
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    • https://s3.amazonaws.com/fizup/south_movie_free_2019.pdfIn PDF document text
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