Malicious PDF — malware analysis report

Static analysis result for SHA-256 411ba0ece1b8ca0e…

MALICIOUS

PDF

384.4 KB Created: 2015-08-29 11:08:41 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b7821980bda054584457354fbe0375be SHA-1: 054ae1fe941d8a3912704e529d21a59fdd09426f SHA-256: 411ba0ece1b8ca0ef971e581e23a7e3756058d46403f602e54897f9c1984cf3e
150 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, botcraftman.ru. This indicates the document's primary purpose is to lure the user to a harmful site. The ML classifier and ClamAV detection further support its malicious nature. No scripts were extracted, but the embedded URL is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

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-8793951-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8793951-0
  • 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=naruto+shippuden+ultimate+ninja+storm+3+pc+%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//4829/4829863_kuysh__turuynda__tatarcha_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830037_prikaz__po_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4830/4830015_deklaraciya__o__dohodah_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005b8d0.bin
87d13c7ddc4a180848f75de05a2764d409119e0f1e9ec1e61a15f1d21211f7df		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B8D0 9620 bytes
font_01_sfnt_off0005d292.bin
407dedb56b55ee071133ecc44a471fa8487ee9f73d32e6642046d2f08b522069		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D292 15704 bytes

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