Malicious PDF — malware analysis report

Static analysis result for SHA-256 88e38333acb1fa28…

MALICIOUS

PDF

352.7 KB Created: 2015-08-26 10:09:57 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c96b9fb91236eae342757349e2563ff8 SHA-1: ae9cd4c4cfbdfc456340d973ddbfd1c313f5b0ea SHA-256: 88e38333acb1fa282a60ed5a345d102a3965d1587109db5cec26a898c54bb26e
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL 'http://botcraftman.ru/?lip&keyword=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B4%D0%B8%D0%B0%D0%B1%D0%BB%D0%BE+2+%D1%81+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82%D0%B0&charset=utf-8' is associated with known malicious infrastructure. The ML classifier also flagged this PDF with a high confidence score. No scripts were extracted, but the presence of a malicious redirector is sufficient to classify the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

Heuristics 2

  • 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.
  • 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B4%D0%B8%D0%B0%D0%B1%D0%BB%D0%BE+2+%D1%81+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82%D0%B0&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751756_skachat__maynkraft__172_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751703_dzheylbreyk__na__iphone_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751570_pushkin__zimnyaya__doroga_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053f35.bin
4bfbb8742496836a81621d4abb87ae6fa0562560e74c077a05bce0137306795f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F35 8000 bytes
font_01_sfnt_off000556c2.bin
992eec121a7e349aaaafcba805608df35f6047cda0a969e938dc96ecdaee7c24		 pdf-font-stream PDF embedded font (sfnt) at offset 0x556C2 14340 bytes

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