Malicious PDF — malware analysis report

Static analysis result for SHA-256 74a03c6605d2cdda…

MALICIOUS

PDF

356.7 KB Created: 2015-08-24 00:12:54 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 0de44c5b7f9eba3d907827412043eeb7 SHA-1: 4de2ad689799704179bcf9c0f7f5d16e9dce138b SHA-256: 74a03c6605d2cddafa54c2e63c8e7e1dac3fc0a8cb729f0ade789ec9730d38fa
90 Risk Score

Malware Insights

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

The primary indicator of maliciousness is a critical heuristic firing for a PDF link pointing to a known malicious redirector infrastructure. The ML classifier also strongly flagged this PDF. The embedded URL is likely part of a phishing or malware distribution chain. No scripts were extracted from this sample, limiting further analysis of its behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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%A1%D0%BA%D0%B8%D0%BD+%D0%B4%D0%B5%D0%B2%D1%83%D1%88%D0%BA%D0%B8+%D1%81%D1%83%D0%BF%D0%B5%D1%80%D0%BC%D0%B5%D0%BD%D0%B0+%D0%B4%D0%BB%D1%8F+minecraft&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693212_anglo__russkiy__slovar_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693393_chertezhi__modeley__parusnuyh_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693837_skachat__albom__sektor_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055005.bin
f5e3dd7d83f9db35be0c00c3f38291c2f503ceedea7ab7207bd2338690ed26f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55005 9100 bytes
font_01_sfnt_off00056952.bin
ab2a1dc5e3af11fde63dd871a7c609825900121400c920a9f487a4c3fa339b4a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56952 13736 bytes

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