Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b20cb1527a8b073…

MALICIOUS

PDF

352.2 KB Created: 2015-08-25 14:41:10 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f62e30a20f51a4230bf2c028e1362fa7 SHA-1: fd246cff422919095567466bcd8b36a46257aed8 SHA-256: 3b20cb1527a8b073688d4d23077df16dac55cc22532b527e2967ccad4392c0d9
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, botcraftman.ru. This heuristic firing, combined with the ML classifier's high confidence, indicates the document is designed to redirect users to a malicious site. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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%9F%D0%BE%D1%81%D1%82%D0%B0%D0%B2%D0%B8%D1%82%D1%8C+%D1%81%D0%BA%D0%B8%D0%BD+%D0%BD%D0%B0+%D0%BC%D0%B0%D0%B9%D0%BD%D0%BA%D1%80%D0%B0%D1%84%D1%82+152+%D0%BF%D0%BE+%D0%BD%D0%B8%D0%BA%D0%B0%D0%BC&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731215_terpkiy__vkus__lyubvi_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731153_porno__roliki__avi_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4731/4731408_skachat__chituy__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053d92.bin
6cf51c841c8056cf1ff47ecce979601b77bdbc021048fec5c705be96736cdbbf		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D92 9528 bytes
font_01_sfnt_off0005595c.bin
fb3618b3e9b3590e898b4b385a2663df96351f7d72e2418431bb6807f9f71eaa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5595C 12528 bytes

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