Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7379ebab0ef963b…

MALICIOUS

PDF

373.7 KB Created: 2015-08-26 10:20:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d19dda43e1b293f6e4b9a612cc714b98 SHA-1: 30c9ec72a25f065862dcfb47273f72fa27bd9ba0 SHA-256: f7379ebab0ef963b65f531ef02fc3bd02bffa3c8a9f84646684c755fee5dffa4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'http://botcraftman.ru/'. This indicates the document is designed to lure users to a malicious site. The ML classifier also strongly flagged this PDF as malicious, and ClamAV detected it as a Pdf.Dropper.Agent. The presence of a malicious URL suggests the intent is to deliver a second-stage payload or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 3

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • ClamAV: Pdf.Dropper.Agent-9310032-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9310032-0
  • 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 http://botcraftman.ru/?lip&keyword=stalker+shadow+of+chernobyl+10006+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752427_stalker__shadow__of_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752012_zvuk__sirenuy__pozharnoy_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751842_seriya__knig__grozovuye_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058756.bin
ef891a395c924cda20161e097150e831c316aab9ab3ad74dd8a25d535cf1915e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58756 10888 bytes
font_01_sfnt_off0005a576.bin
b6d6659153c58516401b428ccf6b47f013f4cdc3538b76ecb0d34f2fe603ba51		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5A576 16320 bytes

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