Malicious PDF — malware analysis report

Static analysis result for SHA-256 355b42e661a6bfe0…

MALICIOUS

PDF

362.8 KB Created: 2015-08-23 20:54:48 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f135ec19fb85321959b1bd2c481d8892 SHA-1: 31714750dad0c67e1a5739b15194e374531e915d SHA-256: 355b42e661a6bfe0c06283b652c84ad01e0331a72fe6dbed8dd3338594880c3e
90 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to a potentially harmful website, which could lead to credential harvesting or further malware infection.

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%BA%D0%BE%D1%80%D1%81%D0%B0%D1%80%D1%8B+3+%D0%B2%D0%B5%D1%82%D0%B5%D1%80+%D1%81%D0%B2%D0%BE%D0%B1%D0%BE%D0%B4%D1%8B+%D0%BF%D1%80%D0%BE%D1%85%D0%BE%D0%B6%D0%B4%D0%B5%D0%BD%D0%B8%D0%B5+%D0%BA%D0%B2%D0%B5%D1%81%D1%82%D0%BE%D0%B2&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4690/4690042_new__english__file_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4690/4690040_obrazec__dopolnitelnogo__soglasheniya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4690/4690047_golaya__baba__rakom_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056074.bin
44740b762e9a250253fe8b8a9c40a7b50923d3505fc2f6b8c85167b9937cfc96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56074 8096 bytes
font_01_sfnt_off000577c9.bin
6c61388d6a1d616deec3db26bbbe8e1b839e2f2416c7530c8cecef5786021010		 pdf-font-stream PDF embedded font (sfnt) at offset 0x577C9 16888 bytes

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