Malicious PDF — malware analysis report

Static analysis result for SHA-256 d20b2efab2ef2a34…

MALICIOUS

PDF

360.9 KB Created: 2015-08-25 22:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: bb3ec32ac987c78acb60f74fb5db798d SHA-1: db5b30d7c0be0abdac2529c0f89efe6cec2d15f9 SHA-256: d20b2efab2ef2a347149f4c60e4d0d9e88c631e220cf2d35e8109ff01e3c9e1e
90 Risk Score

Malware Insights

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

The PDF contains an embedded link to a known malicious redirector, botcraftman.ru. This indicates the document is designed to lure users to a harmful website. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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%BA%D0%BB%D1%8E%D1%87+%D0%BA+%D0%B8%D0%B3%D1%80%D0%B5+%D0%B2%D0%B8%D1%80%D1%82%D1%83%D0%B0%D0%BB%D1%8C%D0%BD%D1%8B%D0%B9+%D0%B3%D0%BE%D1%80%D0%BE%D0%B4&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740582_tablica__shulte__onlayn_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740572_albom__ploschadok__pod_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4740/4740584_krossvorduy__detskie__skachat_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055d08.bin
e7fb1ad8f5a189cb178a5d7a00e53b7083ae2dc9da60f52fa488943e19bdfa32		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55D08 9468 bytes
font_01_sfnt_off00057735.bin
9e66a477a2a8222e09c9c408fac294bf654d25cc0c71b0b6a603dd140dc5764a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57735 14028 bytes

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