Malicious PDF — malware analysis report

Static analysis result for SHA-256 d463ec62e0b64405…

MALICIOUS

PDF

365.4 KB Created: 2015-08-29 11:04:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 9f012551b00162e90ffc18904ad783d3 SHA-1: 19e5096c3b55e0ebfdb3e56a69ca9de063344f5a SHA-256: d463ec62e0b64405f95ddc645ba14f3af4940375e23778e61d6c7ea2af17de89
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to 'http://botcraftman.ru/'. This is strongly indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic and confirmed by the ML classifier and ClamAV detection. The file is identified as a 'Pdf.Dropper.Agent-9052170-0' by ClamAV, suggesting its primary purpose is to drop or download additional malicious content. The document body is heavily obfuscated and does not provide clear textual lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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-9052170-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9052170-0
  • 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=fallout+new+vegas+type+3+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829836_programma__selhoztruda__8_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829831_isoball__3_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4829/4829957_pelageya__i__chernuyy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005691a.bin
f055a0294554b2012ae4533de8d8bc22aed05e25f9be685f5568247abaade7e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5691A 9480 bytes
font_01_sfnt_off00058349.bin
ea72feaf81061838de14de5f03893ecb1bdaa43c47259dc01827b3b3326cd521		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58349 16788 bytes

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