Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c9c652a9581b3c0…

MALICIOUS

PDF

339.5 KB Created: 2015-08-24 00:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: af4c97f363ebc11148db5dce00274b32 SHA-1: f993ce7e3b8f4bcd8f43e24f3bb3cd7920c539a0 SHA-256: 2c9c652a9581b3c0f27d312215f72d25e9cbd3c7465ca8aac14d4f827bf9b53c
90 Risk Score

Malware Insights

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

The PDF contains an embedded link that redirects to a known malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains text related to 'blockland v20', suggesting a lure to download or access this software. The ML classifier also strongly flagged this PDF as malicious. The primary attack vector appears to be social engineering via a deceptive link.

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+blockland+v20&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693557_razreshenie__na__svidanie_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694021_zadaniya__po__russkomu_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693983_akt__priema__peredachi_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00050709.bin
10fce850273bd44e35d3483a82f869b0b0b89157788325849b7374ad040e6851		 pdf-font-stream PDF embedded font (sfnt) at offset 0x50709 9552 bytes
font_01_sfnt_off000521ba.bin
ee258f40a86dac9183ec51c4fd21e108f5255ad3c83efbc3252fd15d124ffbd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x521BA 14312 bytes

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