Malicious PDF — malware analysis report

Static analysis result for SHA-256 73796c6c4a572ff9…

MALICIOUS

PDF

367.6 KB Created: 2015-08-24 04:23:57 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: bb10f159b0b9dafaaa2b9cbed8863ec5 SHA-1: a31034a9536333dff62bdf61c3e0dd7440d6621e SHA-256: 73796c6c4a572ff9235c2a03f1c10a762a0915fc155e3f456d8609f760a9fa95
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing indicating a malicious redirector link to botcraftman.ru. The ML classifier also strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site for further exploitation, likely via a spearphishing attachment delivery vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%B8%D1%86%D1%85%D0%B0%D0%BA+%D0%BF%D0%B8%D0%BD%D1%82%D0%BE%D1%81%D0%B5%D0%B2%D0%B8%D1%87+%D1%81%D1%82%D0%B0%D0%B2%D1%8C+%D1%86%D0%B5%D0%BB%D0%B8+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4697/4697671_dosrochnoe__egye__po_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695825_autodata__342_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4697/4697812_skachat__mod__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057958.bin
303242bfbc47dea084dfa0de10ca4efae4469c381e6f12b2e943d62b8d700265		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57958 7672 bytes
font_01_sfnt_off00058fa8.bin
c239f928523784a43ca4f3368cb7600a04bdf071561da5a8e0cce87d0680eaa4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58FA8 15308 bytes

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