Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b4fdfadf2b4521…

MALICIOUS

PDF

362.9 KB Created: 2015-08-21 09:13:53 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: d28b6e659f26c183ec7c398ef8958295 SHA-1: 7951e459ef9359c7f9d900453d705384dda6b994 SHA-256: b7b4fdfadf2b4521d6bdf91f58c2d909f6058b16e3e62e1f174367da7ac3b5fc
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to botcraftman.ru. This indicates the file's primary purpose is to lure the user to a malicious site. ClamAV also detected this as Pdf.Dropper.Agent-8900368-0, further confirming its malicious nature as a dropper. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier clean score 0.0936

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-8900368-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8900368-0
  • 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=%D0%9D%D0%B0%D1%81%D1%82%D0%BE%D0%BB%D1%8C%D0%BD%D1%8B%D0%B5+%D0%B8%D0%B3%D1%80%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%B2%D0%B7%D1%80%D0%BE%D1%81%D0%BB%D1%8B%D1%85+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B8+%D1%80%D0%B0%D1%81%D0%BF%D0%B5%D1%87%D0%B0%D1%82%D0%B0%D1%82%D1%8C&charset=utf-8

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056685.bin
bf16185237b09902a4ebc0a1379c7a2b0793a377b86b12ff5a68b16aa49a1cf3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56685 8356 bytes
font_01_sfnt_off00057e5f.bin
5a4284120a679ae01d00d01e27f3f347059b6d6b9bba9e3f4f977d32aeebb9f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57E5F 14456 bytes

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