Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ef1ff688391dfec…

MALICIOUS

PDF

351.8 KB Created: 2015-08-24 03:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e82220bf521e1992a31f80a7d06829a9 SHA-1: c9a497b3c2a5954e221cc76d7825a63a31e555e7 SHA-256: 3ef1ff688391dfec0b1681c0a35580999494f02e5699809245f6724547046872
92 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector. The redirector URL is http://botcraftman.ru/, which is likely used to funnel users to a malicious website. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%B0%D1%8D%D1%80%D0%BE%D0%B1%D1%83%D1%81+319+%D1%81%D1%85%D0%B5%D0%BC%D0%B0+%D1%81%D0%B0%D0%BB%D0%BE%D0%BD%D0%B0+s7&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4697/4697200_mems__mario__igrat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4696/4696322_programma__shazam_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694599_yagodkin__nikolay__kursuy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005340d.bin
526afe7542de0c4f8024f7fc32b9e4927e93d367c29fec4489762aa0426bf83a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5340D 10396 bytes
font_01_sfnt_off0005518f.bin
723d207fb93da2677b4bcf04971ebb055acd1e8f3b148eba0bd35055799de84d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5518F 15044 bytes

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