Malicious PDF — malware analysis report

Static analysis result for SHA-256 d3e9161088a1645e…

MALICIOUS

PDF

49.6 KB Created: 2020-12-18 00:08:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c5d891bdc2c9f43c6c26e030de95c86 SHA-1: e899bd74d3ff3c2f9de073d194db0d87d61f7a49 SHA-256: d3e9161088a1645e23bb21499f0234b85792843343505a448b3308dc6d4015a9
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing an embedded URI that redirects to a suspicious domain, traffset.ru, with a query parameter suggesting a lure for a 'poison study pdf free download'. Heuristics indicate the PDF is a link farm on disposable hosting, and ClamAV detection confirms it as a phishing trojan. The presence of an embedded URL and the nature of the heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6925

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://traffset.ru/strik?utm_term=poison+study+pdf+free+download
    • https://cdn-cms.f-static.net/uploads/4417403/normal_5fae20149acc3.pdf
    • https://kimegawukinoge.weebly.com/uploads/1/3/4/6/134601577/xinonutuv-jedijapagizek.pdf
    • https://cdn-cms.f-static.net/uploads/4413702/normal_5f96e91fb2e2f.pdf
    • https://topejaliwas.weebly.com/uploads/1/3/4/3/134305960/1900952.pdf
    • https://mujolimu.weebly.com/uploads/1/3/4/8/134868529/leliwemoxezi-goliwana.pdf
    • https://mefemanodi.weebly.com/uploads/1/3/1/4/131454269/detobo_sanulinazenobig.pdf
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/poritir_zebon_xowefon_xejago.pdf
    • https://cdn-cms.f-static.net/uploads/4475562/normal_5fd14c0783934.pdf
    • https://static.s123-cdn-static.com/uploads/4403415/normal_5fcbc463ea3b2.pdf
    • https://static.s123-cdn-static.com/uploads/4491432/normal_5fcdddbdc8dc7.pdf
    • https://cdn-cms.f-static.net/uploads/4366341/normal_5f8c94231e90f.pdf
    • https://uploads.strikinglycdn.com/files/24da059a-7de4-4073-80cc-94d0fde1f2a5/61905568114.pdf
    • https://static1.squarespace.com/static/5fbfd6e2c6d96458361c2338/t/5fc1343e9d79364840b91eff/1606497343509/reriwifewojuxenejugivav.pdf
    • https://uploads.strikinglycdn.com/files/de08b074-b40b-4da4-9214-e8accfec8cb0/76834843703.pdf
    • https://static1.squarespace.com/static/5fc0d3b00b6b03258f353712/t/5fc3cda2f81c9a2a0c164b7d/1606667683315/91213389111.pdf

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