Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a90a1fb7b3b2ad7…

MALICIOUS

PDF

348.3 KB Created: 2015-08-24 02:30:44 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 416fc3a61ce79bef598dffe762234a38 SHA-1: fb58b2787a145cdf08eae448206749dc2f50b76d SHA-256: 9a90a1fb7b3b2ad79743f9959b60be2e58087bc65928d3b8fcd3037a9c034d39
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector, botcraftman.ru. This indicates an attempt to lure the user 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, but the presence of a malicious URL is a high-confidence indicator of malicious intent.

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%9A%D0%B2%D0%B8%D1%82%D0%B0%D0%BD%D1%86%D0%B8%D1%8F+%D0%BE%D1%89%D0%B0%D0%B4%D0%B1%D0%B0%D0%BD%D0%BA%D0%B0+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693415_arabskie__serialuy__na_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695085_visio__2003__skachat_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695471_garri__potter__i_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00052a97.bin
35047f0b7e1681c1b370d7d2b912c83ed6621654e82bb682472af870586e98d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52A97 8968 bytes
font_01_sfnt_off00054491.bin
a04e3000e737ba703316becc85f8df57394ebec7ad33a0e0876d76878df0b82e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54491 14080 bytes

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