Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f58db9800846d63…

MALICIOUS

PDF

359.9 KB Created: 2015-08-26 21:31:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b77a67198b8784c0d00aa9eec499e5df SHA-1: 930d2b37bd6f4af886cced19ea31367f370bc7d9 SHA-256: 2f58db9800846d63f8ee3993482fea54326e3c385488f3099ba1c4161557ad69
90 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to botcraftman.ru, which is associated with malicious activity. The document body is heavily obfuscated and does not provide clear user-facing text, but the presence of the malicious link is sufficient to determine the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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+fifa+13+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D0%BF%D0%BE%D0%BB%D0%BD%D1%83%D1%8E+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8E+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4762/4762977_razvivayuschaya__programma__dlya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4762/4762880_otvetuy__logo__sssr_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4764/4764843_fizika__10__klass_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055da0.bin
f066f349a24e5e82ca775b4acff84696e93d0a56f92c33897c35a141afac8b96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55DA0 8592 bytes
font_01_sfnt_off00057662.bin
697af80eee4d52a35052e325753da5d30672fb1d3fbfedfafbf853fff39830fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57662 13128 bytes

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