Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b0395a26e780e63…

MALICIOUS

PDF

357.2 KB Created: 2015-08-28 11:30:00 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a8032532b359e46cd8d7d0d34a8ad278 SHA-1: 9cda3ffdae14da4bf4ffe77b7bd6cee8bae40d1b SHA-256: 8b0395a26e780e634ad223f0b4b132b1c62120eb23ca85b1d0fec05343f10b5e
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 file is designed to lure users to a malicious site, likely for phishing or to download further malware. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, and the document body was heavily obfuscated.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%8D%D0%BC%D1%83%D0%BB%D1%8F%D1%82%D0%BE%D1%80+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4+%D0%BD%D0%B0+windows+7&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802360_panasonic_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802372_skachat__igru__kak_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802361_kak__perevesti__pechat_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000549c3.bin
8cf056b5393e368b7a0c776dedfa5287166c51ee8d918a6af0db8a6241f0fdb2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x549C3 9416 bytes
font_01_sfnt_off0005640f.bin
a0152474492ac65cf3bebd29a13670e3d5f6b070381b2d93a77d78875d4cd983		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5640F 16080 bytes

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