Malicious PDF — malware analysis report

Static analysis result for SHA-256 441c07f94602f4bc…

MALICIOUS

PDF

311.3 KB Created: 2015-08-27 23:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1fef37f314f6b1ead1b9ca9ea787cca8 SHA-1: 7b458e81df2b15037a8867d5b5711621ca43cc4a SHA-256: 441c07f94602f4bc732885146a190bfb34a5bd1a9856df5747eae8913a64d5d9
90 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru. This indicates an attempt to lure the user to a malicious site. The ML classifier also flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated, limiting further analysis of the exact lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

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=Kb2872339+fix+exe&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787913_skachat__arhikad__16_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787976_sochinenie__kak__ya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787867_obrazec__smetuy__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00049059.bin
4f45089d5ba2abc908b7469e8743351c4da9407e0cc9cbcb9ff7dc09e755dfda		 pdf-font-stream PDF embedded font (sfnt) at offset 0x49059 10968 bytes
font_01_sfnt_off0004af76.bin
5d6400ec300907ee59d3788825fd1fa20453ee40c6a66ce712473bcca8c8ba66		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4AF76 14816 bytes

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