Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3726cba66b2f613…

MALICIOUS

PDF

354.8 KB Created: 2015-08-29 01:22:21 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 21b1a3b4136f8d43a5f04bb9dd774e8a SHA-1: 8b0aec4362eee0230571005c3212d9b1f744d7ab SHA-256: b3726cba66b2f613b41e596f35eada17680f8f5402de010d0fd1a680ce763d9d
92 Risk Score

Malware Insights

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

The PDF file contains an embedded link to a known malicious redirector, http://botcraftman.ru/, which is indicative of a phishing or malware distribution attempt. The ML classifier also flagged this PDF with high confidence. No scripts were extracted from this sample, and the document body was heavily obfuscated and truncated, preventing further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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%92%D0%BE%D1%81%D0%BF%D0%B8%D1%82%D0%B0%D1%82%D0%B5%D0%BB%D1%8C%D0%BD%D1%8B%D0%B9+%D0%BF%D0%BB%D0%B0%D0%BD+2+%D0%BA%D0%BB%D0%B0%D1%81%D1%81+%D0%BF%D0%BE+%D1%84%D0%B3%D0%BE%D1%81&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817590_skachat__filmuy__s_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817746_zhurnal__telesputnik__tablica_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818002_raspisanie__yelektrichek_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054664.bin
18972860f826886424d9d6cfcdaea8e71d6f93e863ce54fc6e50bdf5f0f48fab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54664 8336 bytes
font_01_sfnt_off00055e60.bin
0dfad07a54e55c22130c6852e2347500daf749f5ea2f0151f44cf86fda541c55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E60 14300 bytes

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