Malicious PDF — malware analysis report

Static analysis result for SHA-256 e229e837ea2e0dd6…

MALICIOUS

PDF

37.6 KB Created: 2021-03-07 23:12:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4b31651937d53dfd742c9a75ddaf9da6 SHA-1: d3230103e0f95b028f4802e1a4a7445c43c56bcd SHA-256: e229e837ea2e0dd676960742a8217c80bacd0be0986275f4377139faa946c550
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of screenshot lures. It contains numerous external links, with one prominent URL pointing to a potentially malicious domain. The ClamAV detection and ML classifier further support its malicious nature, indicating it likely serves as a delivery mechanism for further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5302

Heuristics 5

  • 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-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 37 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://druttle.ru/aws?utm_term=convert+8+months+into+days
    • https://wuwonerosetopux.weebly.com/uploads/1/3/1/6/131606808/lopupakunote.pdf
    • https://bonagimeduvutup.weebly.com/uploads/1/3/1/4/131453121/wonunisumazusene.pdf
    • http://rumurel.mywebcommunity.org/is_the_hunger_games_mockingjay_part_2_on_amazon_prime.pdf
    • https://semototip.weebly.com/uploads/1/3/5/3/135386148/jekowovobe.pdf
    • https://pomisefinare.weebly.com/uploads/1/3/4/9/134902228/3ec5174e71ae39.pdf
    • http://jifarobajis.sportsontheweb.net/kenmore_washer_repairs.pdf
    • https://144c9d4d-401b-437b-b89f-6a5816d7da47.filesusr.com/ugd/cd33f5_4afa7524b8824deca3dce6be4a254c67.pdf?index=true

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