Malicious PDF — malware analysis report

Static analysis result for SHA-256 9603394641c30b4a…

MALICIOUS

PDF

366.4 KB Created: 2015-08-26 10:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1d7023bc80734a9199be0da1a8031a89 SHA-1: cd5ac697f42a4651116d828f78c797d37908da94 SHA-256: 9603394641c30b4a2f0c1d875168cc4a4b744e6a3f1f6d75b93965b1d6d490f4
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF was flagged by multiple heuristics, including ClamAV detection as 'Pdf.Dropper.Agent-9269416-0' and a critical alert for a malicious redirector link. The embedded URL 'http://botcraftman.ru/?lip&keyword=50+%D0%BE%D1%82%D1%82%D0%B5%D0%BD%D0%BA%D0%BE%D0%B2+%D1%81%D0%B2%D0%BE%D0%B1%D0%BE%D0%B4%D1%8B+%D0%B0%D1%83%D0%B4%D0%B8%D0%BE%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8' points to known malicious infrastructure. The document body is heavily obfuscated and does not provide clear user-facing text, but the overall behavior indicates a dropper or downloader. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-9269416-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9269416-0
  • 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=50+%D0%BE%D1%82%D1%82%D0%B5%D0%BD%D0%BA%D0%BE%D0%B2+%D1%81%D0%B2%D0%BE%D0%B1%D0%BE%D0%B4%D1%8B+%D0%B0%D1%83%D0%B4%D0%B8%D0%BE%D0%BA%D0%BD%D0%B8%D0%B3%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751728_devushki__na__telefon_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752363_skachat__pro__evolution_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751776_koduy__na__domofonuy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005727a.bin
bcd8ee4585e9f7a9cc3683651bbdcaddc8e635196f7602cc68a6b2a288e54026		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5727A 7644 bytes
font_01_sfnt_off00058894.bin
caa33e2041bb399fd3a810a888fc460074c68a3ddf5af80e9a0b6f5637097d58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58894 16244 bytes

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