Malicious PDF — malware analysis report

Static analysis result for SHA-256 26f7cd5cdff5bcc3…

MALICIOUS

PDF

375.5 KB Created: 2015-08-28 11:58:53 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 29226fb9e917cf20753ccd7c2b4c1ab6 SHA-1: d5a592eac5b95560dfaab463236bc08ad0216c7c SHA-256: 26f7cd5cdff5bcc3cb2e9b5b1d0a84e4628bdd5320c87673d6027cd40076a511
92 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The embedded URL, http://botcraftman.ru/, is confirmed as a malicious redirector. No scripts were extracted, and the document body was truncated and unreadable, but the presence of the malicious link is sufficient evidence of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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%80%D1%83%D1%81%D1%81%D0%BA%D0%B8%D0%B9+%D0%B6%D0%B8%D0%BC+%D0%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D0%B0+%D1%82%D1%80%D0%B5%D0%BD%D0%B8%D1%80%D0%BE%D0%B2%D0%BE%D0%BA&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802877_licenzionnuye__servera__maynkraft_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802495_anibreak_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802871_skachat__shahmatuy__kasparov_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000593f9.bin
0074b889ee64f45cb26afa39f39dfc6ba0dd5a2430616dd6beca2e155347e3f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x593F9 8640 bytes
font_01_sfnt_off0005ad3c.bin
daa79150cf81c2fa009d776e5a18cb153fb3be2cd58372b323156d88a7bac6ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AD3C 15892 bytes

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