Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6941b6f32d707b3…

MALICIOUS

PDF

348.4 KB Created: 2015-08-26 19:08:57 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d37ba24e07acb11d489ddb9f84a36450 SHA-1: a857661627d2a5c91660abc989230e655e602996 SHA-256: e6941b6f32d707b3d05ca9e32fa5ac44d9bdbfc7901216e23ee7aa61b36a7259
90 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector, http://botcraftman.ru/. This heuristic firing, combined with the ML classifier's high confidence score, strongly indicates malicious intent. The document body is heavily obfuscated and unreadable, providing no further context on the lure. The primary attack vector appears to be directing the user to a malicious external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=%D0%BA%D0%BB%D1%8E%D1%87+%D0%BA+%D0%B8%D0%B3%D1%80%D0%B5+%D1%81%D0%B5%D0%BA%D1%80%D0%B5%D1%82%D0%BD%D1%8B%D0%B9+%D0%B1%D1%83%D0%BD%D0%BA%D0%B5%D1%80+%D1%81%D1%81%D1%81%D1%80+%D1%87%D0%B8%D1%82%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4762/4762662_mac__os__x_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4762/4762571_pascal__abc__uchebnik_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4762/4762153_principialnaya__yelektricheskaya__shema_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052945.bin
18823946a77b442e9269fc68255c4ce9cbddc43bcf911257ccd29a0c851ac36c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52945 7696 bytes
font_01_sfnt_off00053f27.bin
0bdfdbc5b5b17c9a6db90546645c2d6a9ec4ac5e3b35002ad44305e32556cdac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53F27 16936 bytes

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