Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f3bc7cd48709814…

MALICIOUS

PDF

388.2 KB Created: 2015-08-25 09:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c6f3b1fc8f09c61a5af40fbafd42439b SHA-1: 0f1b3c0210777833bce175122aab53bab50d9016 SHA-256: 7f3bc7cd48709814b2480bb664c7ad02c62482b6c97e251bf73a2d5e1611a8f3
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 ML classifier also strongly indicated maliciousness. The embedded URL points to botcraftman.ru, which is identified as a malicious redirector. No scripts were extracted, but the presence of a malicious link strongly suggests a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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+%D1%81%D0%B5%D1%80%D0%B8%D0%B0%D0%BB+%D1%83%D0%B1%D0%BE%D0%B9%D0%BD%D0%B0%D1%8F+%D1%81%D0%B8%D0%BB%D0%B0+1+%D1%81%D0%B5%D0%B7%D0%BE%D0%BD+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725571_war__times__skachat_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4725/4725343_darya__doncova__matreshka_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4726/4726405_geroi__3__wog_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005bf49.bin
6df0fd85ad0b40c50ab7c74680da177380c27d033cd2aee8faec77d1ac7597b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5BF49 9936 bytes
font_01_sfnt_off0005dab5.bin
f3d9c8bc74ab6a586837b1055d948fa8b00ab599bb48ed55227c9255e883c8b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DAB5 17536 bytes

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