Malicious PDF — malware analysis report

Static analysis result for SHA-256 03ac411d1d328a94…

MALICIOUS

PDF

359.6 KB Created: 2015-08-21 09:19:13 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 9a8d78f8474bc46d9e81e19e7a43c8c3 SHA-1: 19cf241cb8361bbdd4813c4f07f5303d0f55def4 SHA-256: 03ac411d1d328a945b1aa58e97735aea597a3cb0dd048f02bd666964e6fa422a
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is highly indicative of malicious intent. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded URL is sufficient evidence to classify this as a malicious redirector used for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B2%D1%81%D0%B5+%D1%81%D0%B5%D1%80%D0%B8%D0%B8+%D1%85%D0%B1+%D1%87%D0%B5%D1%80%D0%B5%D0%B7+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D0%B2+%D1%85%D0%BE%D1%80%D0%BE%D1%88%D0%B5%D0%BC+%D0%BA%D0%B0%D1%87%D0%B5%D1%81%D1%82%D0%B2%D0%B5&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654694_shkolnica_3_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654688_esli_s_rebenkom_trudno_petranovskaya_skachat_fb2.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4654/4654710_videopaseka_3_skachat_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00055799.bin
44032fde223d3f06d409380b2aaafbfbff141129e06709b90d35ce29df85c174		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55799 8628 bytes
font_01_sfnt_off00057100.bin
4aafa8ba6425d114994b0939c9ac155b93be6da17a549a0e66edf0faffb9bade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57100 14416 bytes

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