Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b28d98289d513e8…

MALICIOUS

PDF

374.9 KB Created: 2015-08-24 00:22:27 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: bd1262afe65efbfa306de98400ecca88 SHA-1: 989af8437cd628a47184cae9d77032367eb17912 SHA-256: 3b28d98289d513e82e3135d7867a513cd4dd3e691c3b8caf8eae92a71cb21ccf
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. A critical heuristic identified a link to known malicious redirector infrastructure at http://botcraftman.ru/. This indicates the PDF is likely acting as a dropper or initial lure to redirect users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9943

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-9227883-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9227883-0
  • 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=1%D1%81+%D0%BF%D1%80%D0%B5%D0%B4%D0%BF%D1%80%D0%B8%D1%8F%D1%82%D0%B8%D0%B5+82+%D1%83%D0%BF%D1%80%D0%B0%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D0%B5+%D1%82%D0%BE%D1%80%D0%B3%D0%BE%D0%B2%D0%BB%D0%B5%D0%B9+%D1%80%D0%B5%D0%B4%D0%B0%D0%BA%D1%86%D0%B8%D1%8F+103+%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/6//4694/4694143_bonus__koduy__wot_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693486_igo__primo__2015_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693343_pes__2013__ukrainskaya_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00059197.bin
0fd11d3ec9cd7b6efb30fea940c4de891cb6fe2f5dfde7e32120293162c69e3c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59197 9344 bytes
font_01_sfnt_off0005abc7.bin
78a04e06720fe6377e9b9261f89fb98f2f2a80906ed84ad1db08cbe2c60568af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ABC7 15616 bytes

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