Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fb57968e3dd7c2d…

MALICIOUS

PDF

354.7 KB Created: 2015-08-26 19:02:48 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: bdca31eba1593e050804a549695b3e1e SHA-1: 0c8c44b24ec8885d27ce25e68ff089f925dd1999 SHA-256: 8fb57968e3dd7c2d680c4238bde72f3fcca44a4a4cc18bdf2eae53698f3de883
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/, is likely part of a phishing or malware distribution chain. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the direct user-facing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%BE%D0%BB%D1%8C%D1%88%D0%B0%D1%8F+%D0%BA%D0%BE%D0%BB%D0%BB%D0%B5%D0%BA%D1%86%D0%B8%D1%8F+%D1%8D%D0%BB%D0%B5%D0%BA%D1%82%D1%80%D0%BE%D0%BD%D0%BD%D1%8B%D1%85+%D1%8D%D0%BD%D1%86%D0%B8%D0%BA%D0%BB%D0%BE%D0%BF%D0%B5%D0%B4%D0%B8%D0%B9+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+torrent&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4762/4762513_russkie__medlyaki__skachat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4762/4762150_chit__koduy__na_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4762/4762554_batman__arkham__city_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053a91.bin
c13e5b6ef4605ddd5e516564e51e6f2a639e1049bbaba9d2b97cb596aa353b2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53A91 11028 bytes
font_01_sfnt_off00055839.bin
3abc38b4433946fbbbdfd7abc501ee56f1e999a0f71b1ad10950a819f7a21510		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55839 17340 bytes

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