Malicious PDF — malware analysis report

Static analysis result for SHA-256 7673a2aeae85d258…

MALICIOUS

PDF

365.3 KB Created: 2015-08-29 01:16:50 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 80380d4e741b4cf2cba5d02787977b29 SHA-1: e5b18405954362c1fbd1da58a43f6e7bdb1f2ef2 SHA-256: 7673a2aeae85d2587dea8e9e6c54702f375dd908fbd311096fbd9b1404ac0f95
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector infrastructure, botcraftman.ru. This heuristic firing, combined with the ML classifier's high confidence, indicates the file's malicious intent. The embedded URL is likely used to deliver a second-stage payload or redirect the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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=140802+%D0%9C%D0%BE%D1%81%D0%BA%D0%BE%D0%B2%D1%81%D0%BA%D0%B8%D0%B9+%D0%B0%D1%81%D1%86+%D0%B4%D1%82%D0%B8+%D0%B7%D0%B0%D0%BA%D0%B0%D0%B7%D0%BD%D0%BE%D0%B5+%D0%BF%D0%B8%D1%81%D1%8C%D0%BC%D0%BE&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817893_matematika__5__klass_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817967_zvuki_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4817/4817449_raspisanie__304_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000570c1.bin
0b493ddc38f5774ac94fb50508577dc942c7eaa0a523a6f6e2e58ffe98dda658		 pdf-font-stream PDF embedded font (sfnt) at offset 0x570C1 8592 bytes
font_01_sfnt_off000589c7.bin
e815330f3d176633b682b0b3ef6e3f04cb6835ebce1057ee748b87a156b71028		 pdf-font-stream PDF embedded font (sfnt) at offset 0x589C7 13792 bytes

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