Malicious PDF — malware analysis report

Static analysis result for SHA-256 642837f3c5b225b0…

MALICIOUS

PDF

334.3 KB Created: 2015-08-29 01:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: cb7e27864a8cfb60567c2c44183dbef2 SHA-1: 5df400ee82ec82e8476299a1618aaadb71410b7b SHA-256: 642837f3c5b225b01ae59079e788a8cf03b6732aee76e98c5cf08a0dacb4e77a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/, is identified as a malicious redirector. While no scripts were extracted, the presence of a malicious link strongly suggests an attempt to lure the user to a compromised site for further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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+%D0%B2%D0%BA+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4818/4818297_propovedi__filippa__savochki_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817753_vzlom__tuner_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817647_explay__gn530_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004f0fa.bin
c6a0c3a552dd5e9d2c1a2aa32190af4d8b22f978a7a666a6f14c525554586666		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F0FA 7988 bytes
font_01_sfnt_off00050803.bin
6b4691128570056e4ba072777b695bdf6fd0308dbed1faba12c18fe418054496		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50803 16360 bytes

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