Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1a3796fe9e22d3…

MALICIOUS

PDF

368.6 KB Created: 2015-08-26 13:18:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c441600341a71b1776b787b35bd6e303 SHA-1: fa0f29ba89cd344af142b47126e027773be9d6f8 SHA-256: af1a3796fe9e22d3a36abb0b8032fe49b1a6a5510caf2d47a6d57f7ba6716832
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 likely part of a phishing or malware distribution chain. No scripts were extracted, and the document body was truncated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%D0%B0%D0%B4%D0%B8%D0%BE%D0%BB%D1%8E%D0%B1%D0%B8%D1%82%D0%B5%D0%BB%D1%8C+2015+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4755/4755575_kak__raskrutit__gruppu_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4753/4753144_spravka__ob__otsutstvii_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4755/4755031_kdr__po__matematike_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057e56.bin
d8f8546e021af40c83d761d951b7824750b53c8e2a5883c35c1d54ad1e26e856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E56 8544 bytes
font_01_sfnt_off0005976d.bin
a600391390d7d5e96d9a8fbf84a60351ec1d74270c21c3f1a3d0cbbf07b2f984		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5976D 13696 bytes

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