Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fed296036d65d78…

MALICIOUS

PDF

350.2 KB Created: 2015-08-27 23:56:09 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 9cabcd8eafd4ca41e8cfdff8cb2e58b3 SHA-1: 0a574130618313bf043a3882d956c0cd901ca133 SHA-256: 4fed296036d65d78a19b367cce18dba31847aa5b0f2a5b2cb995ffcf5bbd83b8
90 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is identified as a malicious redirector. No scripts were extracted, and the document body was heavily obfuscated, preventing further analysis of its specific lure. The primary attack vector appears to be directing the user to a malicious site via the embedded link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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+%D0%BC%D0%BE%D0%B4+%D0%BD%D0%B0+%D0%BC%D0%B0%D0%B9%D0%BD%D0%BA%D1%80%D0%B0%D1%84%D1%82+1+6+4+%D0%BD%D0%B0+%D0%BF%D1%80%D0%B5%D0%B2%D1%80%D0%B0%D1%89%D0%B5%D0%BD%D0%B8%D0%B5+%D0%B2+%D0%BC%D0%BE%D0%B1%D0%BE%D0%B2&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788023_virtualnuyy__seks_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4788/4788162_holostyak__2__sezon_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4787/4787923_skazka__yekspromt__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005338d.bin
e761f5c7df73f7dfdd21c26d3d626da0a9f29b3ea8b674469bc4487feb63fd2e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5338D 9576 bytes
font_01_sfnt_off00054e0d.bin
1f845dffb8cf6a4a3fd67ec200c01ced3893a38da3ab0e2bed115c678b939911		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E0D 13668 bytes

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