Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c9b4a1df9330b19…

MALICIOUS

PDF

359.8 KB Created: 2015-08-24 07:09:47 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: dee81682c983de77dbf56c2a8fdcac66 SHA-1: 12381e5517456b7496d914e9ce69aecb29e274c1 SHA-256: 4c9b4a1df9330b198f4e631e234c8e856b7789d7d7e52b8cbf22c8e5be8331ef
90 Risk Score

Malware Insights

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

The PDF was flagged by a machine learning classifier and contains a critical heuristic indicating a link to known malicious redirector infrastructure. The embedded URL http://botcraftman.ru/ is likely part of a phishing or malware distribution chain. No scripts were extracted, and the document body was heavily obfuscated, preventing further analysis of its specific content.

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=%D0%B3%D0%B8%D0%BC%D0%BD+%D0%BB%D1%8E%D1%84%D1%82%D0%B2%D0%B0%D1%84%D1%84%D0%B5+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC+%D1%81%D0%BB%D1%83%D1%88%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4703/4703575_chit__na__dengi_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4697/4697751_insurgent__kniga__skachat_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4702/4702610_skachat__asku__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055853.bin
c743bba967cbffa8c1932b882725fbca9135194fe67ab823270e18e2a1bdaf31		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55853 8920 bytes
font_01_sfnt_off000571f9.bin
b1166b9b45cdac33c508f87b8f5e61b0ecb5545b524da9939eb80d90a59df779		 pdf-font-stream PDF embedded font (sfnt) at offset 0x571F9 15104 bytes

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