Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cfb0528dfb9d0b3…

MALICIOUS

PDF

41.3 KB Created: 2020-12-18 15:53:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f94d71e55180e52d2b86d4a6ba0f3e83 SHA-1: f9aca0121fcab6166fd33fc183a3df2c4c51051d SHA-256: 0cfb0528dfb9d0b38e3c64ff8e277e5773a78f01c7fe04c5763e122a9590c817
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier. It employs an image-only lure, typical of phishing, with an embedded URI pointing to 'trafffe.ru'. The document body is heavily obfuscated, but the presence of an external URI and the heuristic firings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7539

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://trafffe.ru/strik?utm_term=davis+golf+clubs+thermometer
    • https://cdn-cms.f-static.net/uploads/4377679/normal_5fd27cc87d7e7.pdf
    • https://cdn-cms.f-static.net/uploads/4370746/normal_5fbd81f1526f9.pdf
    • https://cdn-cms.f-static.net/uploads/4405185/normal_5fc2558065fd6.pdf
    • https://cdn-cms.f-static.net/uploads/4451954/normal_5fb5ce511e84e.pdf
    • https://cdn-cms.f-static.net/uploads/4368751/normal_5f9dfc815d62b.pdf
    • https://cdn-cms.f-static.net/uploads/4402712/normal_5f9574d92f181.pdf
    • https://s3.amazonaws.com/zakunafu/tv_varzish_software.pdf
    • https://static1.squarespace.com/static/5fc042db8787e8798968ae67/t/5fc9e716414f5e35237ce1f2/1607067414338/fashion_nail_salon_game_download.pdf
    • https://s3.amazonaws.com/supefujoxopubu/59676795501.pdf
    • https://uploads.strikinglycdn.com/files/ead07024-bf28-49bd-bb0d-12b224794e4c/54670065323.pdf
    • https://s3.amazonaws.com/mipeboro/fopagafiremer.pdf
    • https://s3.amazonaws.com/guwutivupudutu/42929506581.pdf
    • https://static1.squarespace.com/static/5fc5407160f2895dc1046ad0/t/5fc7f447bc205d67881c6eb8/1606939719691/sopawafudidu.pdf
    • https://s3.amazonaws.com/xakusineba/domozumedisodesekelama.pdf
    • https://uploads.strikinglycdn.com/files/437f9f30-d8f9-45b5-b7e0-f780aafbb08c/navujusotisepedamorune.pdf
    • https://s3.amazonaws.com/zafaronivaj/64334905262.pdf

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