Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8e6929f51e490c…

MALICIOUS

PDF

353.4 KB Created: 2015-08-26 10:06:41 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b8f2a58e86c022426b9652fe03fea097 SHA-1: 3ef5992c81dfc2c95b14ff8d3a92c460937132bf SHA-256: bd8e6929f51e490c2c3da1a8b49335d4571cc3053607898651b5f95f430d1631
150 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link to http://botcraftman.ru/. This URL is likely used to lure users to a malicious site for phishing or malware delivery. The ML classifier also flagged the PDF with high confidence. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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-9147584-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9147584-0
  • 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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+mobimeet+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F+118&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751594_uchebnik__po__fizike_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751450_malenki__piski__malenkih_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751785_ajax__php__mysql_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053bfb.bin
ecadca56b4ffe18d77c91f3a3ad5b2401535fc4323fcc81d94430f637f903c4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53BFB 8560 bytes
font_01_sfnt_off00055458.bin
de27c72934ddaa313cf29a6c98061a7fea58228cf351e190e9988cc222ffeb91		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55458 16696 bytes

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