Malicious PDF — malware analysis report

Static analysis result for SHA-256 a38c89ead5252a12…

MALICIOUS

PDF

369.6 KB Created: 2015-08-28 11:28:33 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: b3348a61ce471f640e192d5e5fb54911 SHA-1: 8d7f85ff8ebab8283c377d4d0e86d792896ce740 SHA-256: a38c89ead5252a12ccb8d1e112ab93f9087494438c4ac8f087c6766dcf33ea54
98 Risk Score

Malware Insights

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

The PDF file contains an embedded JavaScript stream and a link to known malicious redirector infrastructure. The ML classifier also flagged this PDF with high confidence. The primary malicious indicator is the URL http://botcraftman.ru/, which is likely used to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 3

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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%B0%D0%BA+%D0%B2%D0%BE%D1%81%D1%81%D1%82%D0%B0%D0%BD%D0%BE%D0%B2%D0%B8%D1%82%D1%8C+%D1%83%D0%B4%D0%B0%D0%BB%D0%B5%D0%BD%D0%BD%D1%8B%D0%B5+%D0%BF%D1%80%D0%B8%D0%BB%D0%BE%D0%B6%D0%B5%D0%BD%D0%B8%D1%8F+%D0%BD%D0%B0+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4796/4796309_game__maker__81_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4801/4801461_gazovaya__kolonka__neva_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4791/4791159_skachat__vk__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058136.bin
f208a93d8bf01722ed6c39b2f0d8c881e5aa3e86f3a5f2966f7e8537b6b7915a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58136 8172 bytes
font_01_sfnt_off000598d9.bin
284ddc0cd0fb5f69e17e28afd208d6c5b4c49dcedcf5e57165a326d0511e920c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x598D9 15212 bytes

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