Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb362290bb98f2c4…

MALICIOUS

PDF

356.8 KB Created: 2015-08-26 09:54:01 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 039c3cffbb10dd38ce474ebfabd0bf44 SHA-1: 6dcf029b7552d2414756a87d0044c6cdfbe3d3c4 SHA-256: bb362290bb98f2c46e9044ae75935ff79a795e60e73345cef5c4cb7b658bfdb9
90 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF as malicious. The embedded URL points to 'botcraftman.ru', which is associated with malicious activity. The document body is heavily obfuscated and unreadable, but the presence of the malicious link is sufficient to infer the attack pattern.

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=serious+sam+2+%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//4751/4751726_telefon__samsung__galaksi_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751868_otvetuy__po__rabochey_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751594_uchebnik__po__fizike_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054b30.bin
31364af923d6f7944a7f8e85b97349db10bd54cb198273566bb9b83166c2ffce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54B30 9696 bytes
font_01_sfnt_off0005660d.bin
9232d447e5818209956a925d1978a25bb90802cdca6a55425095951e1b58f9d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5660D 14700 bytes

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