Malicious PDF — malware analysis report

Static analysis result for SHA-256 49577c12e75b9084…

MALICIOUS

PDF

186.2 KB Created: 2015-08-05 16:38:16 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f801b9b3622aaf26bb45a25bdd240e6a SHA-1: aa43a2bebd905de65e6703c984a6cb87ca58fb64 SHA-256: 49577c12e75b90845e8f2a83e0231b4419fae12018c6a849a8e7254d68ad4b61
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is indicative of a downloader or droppper malware. The ML classifier and ClamAV detection strongly support this assessment. The embedded URL is likely used to serve a second-stage payload to the victim.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7527446-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7527446-0
  • 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=test+drive+unlimited+2+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4306/4306140_skachat_besplatno_drayver_na_printer_hp_laserjet_1005.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4305/4305246_golodnuye_igruy_knigi_skachat_besplatno_fb2.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304559_zune__nokia_lumia_800__.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002aa0f.bin
52580cc4748cb2708606a13ffcf094b67b08c60dc7055a7c00a1d5ff4242bacd		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AA0F 7120 bytes
font_00_sfnt_off0002421d.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2421D 3556 bytes
font_01_sfnt_off00024fa0.bin
d6dc39ace63573a43415eea21b757b3fdb24e9f559179408d89ba8905fa95464		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24FA0 15144 bytes
font_02_sfnt_off00027e57.bin
59b171771e22f7f70835868fe1990f48573cfde7e9391b21c9885509052bd9cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27E57 14792 bytes
font_04_sfnt_off0002bed0.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BED0 6084 bytes
font_05_sfnt_off0002ce65.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CE65 3752 bytes

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