Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbf92afd39189db…

MALICIOUS

PDF

348.0 KB Created: 2015-08-28 11:34:04 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a670e3d8cdec6820871881ad91651417 SHA-1: 58e6caa34c2936e32398030bcb0350cb48507c47 SHA-256: dcbf92afd39189db3f2e2ccb9d83cd1531e4cffd8ec40489d348f94586e271c0
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, strongly suggests the document is designed to lure users to a malicious site. The document body is heavily obfuscated and unreadable, providing no further context on the specific lure. No scripts were extracted from this sample.

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%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D1%8B%D0%B5+%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%8B+%D1%80%D0%BE%D0%B4%D0%B8%D1%82%D0%B5%D0%BB%D1%8C%D1%81%D0%BA%D0%BE%D0%B3%D0%BE+%D0%BA%D0%BE%D0%BD%D1%82%D1%80%D0%BE%D0%BB%D1%8F&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802382_russkaya__vyaz_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802427_diplomnuyy__proekt__pgs_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802390_dragunkin__angliyskiy__yazuyk_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052cfe.bin
25283ba826d56d5a1bff626df8fb2e3e48f531c77be31d80da4e4f6ca6011e6d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52CFE 7740 bytes
font_01_sfnt_off00054371.bin
2e22fdb3b75256227ab503f04e003d4520f58ddf342d0981b9bb63748cac0707		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54371 14324 bytes

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