Malicious PDF — malware analysis report

Static analysis result for SHA-256 18b034a54aa8b371…

MALICIOUS

PDF

52.6 KB Created: 2021-01-11 08:20:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0960e72df4501f682f2675998c14f6e5 SHA-1: 10d33b2c1115005b42a72c1ca66fcf44bdf8e3ac SHA-256: 18b034a54aa8b371a5275b7b066d29879b256be1e40a6f8c46e356d8697e8974
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to other PDF files, suggesting a link farm or redirection mechanism. One prominent URL, 'https://trafficel.ru/aws?utm_term=3d+photo+cube+live+wallpaper+apk', is presented in a context that mimics a download link for an APK, indicating a potential phishing or malware distribution lure. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7015

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafficel.ru/aws?utm_term=3d+photo+cube+live+wallpaper+apk
    • https://site-1174761.mozfiles.com/files/1174761/55095346509.pdf
    • https://cdn-cms.f-static.net/uploads/4447107/normal_5faaf1b74c379.pdf
    • https://cdn-cms.f-static.net/uploads/4403407/normal_5f96945cad4eb.pdf
    • https://static.s123-cdn-static.com/uploads/4424933/normal_5fc452fa86769.pdf
    • https://cdn-cms.f-static.net/uploads/4478961/normal_5fb6dbbf3c7de.pdf
    • https://cdn-cms.f-static.net/uploads/4366035/normal_5f87179a20d1c.pdf
    • https://cdn-cms.f-static.net/uploads/4380536/normal_5fa5e2b27a961.pdf
    • https://cdn-cms.f-static.net/uploads/4411489/normal_5f969e49db9ac.pdf
    • https://static.s123-cdn-static.com/uploads/4486054/normal_5feff32cd31c4.pdf
    • https://rofexigu.weebly.com/uploads/1/3/0/7/130738805/ff55ecd3af.pdf
    • https://site-1166598.mozfiles.com/files/1166598/61419452177.pdf
    • https://riragojefo.weebly.com/uploads/1/3/1/8/131857115/8645161.pdf

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