Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fda5d6a10883932…

MALICIOUS

PDF

355.6 KB Created: 2015-08-24 00:47:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: cb4a1475914daf7cdf1dc55bb33f4469 SHA-1: 699fcaf778cedf168150c98c9f13f13f19a3ec82 SHA-256: 4fda5d6a10883932f70349ae4fac7c55f67a9552893a72110d8b0af927c35541
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical alert for a malicious redirector link pointing to 'http://botcraftman.ru/'. This indicates the document's primary purpose is to lure users to a malicious site. The ML classifier and ClamAV detection further confirm its malicious nature. No scripts were extracted, but the presence of a malicious URL is sufficient evidence of a phishing or malware delivery attempt.

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.Malware.Agent-9838388-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Malware.Agent-9838388-0
  • 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=Insydeh20+setup+utility+rev+35+ahci&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694850_novuye__knigi__yulii_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694292_mipko__personal__monitor_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693797_koduy__vuychetov__po_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054242.bin
9e8261ea63f0a9416e01af5d534ea83ae058beddc5061b58e405df45870af0b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54242 9976 bytes
font_01_sfnt_off00055e67.bin
dd562036a0035d98beca7c637455049e0718ad12885aeb337c70aa4640b6f68b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55E67 16112 bytes

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