Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b9a95457b5e732d…

MALICIOUS

PDF

391.1 KB Created: 2015-08-26 11:47:00 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: c338e69ff63411558dbc4e7fbbabc527 SHA-1: d71459ee3903c414e2ffe1e242421ee692898263 SHA-256: 1b9a95457b5e732d4b59da0190a0d49a0d25b3b24f2f89d70bd47c0ef5d6f193
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file was flagged by a critical heuristic for containing a link to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious activity, likely serving as a lure to a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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%BF%D1%83%D1%88%D0%BA%D0%B8%D0%BD+%D0%B1%D1%80%D0%B0%D1%82%D1%8C%D1%8F+%D1%80%D0%B0%D0%B7%D0%B1%D0%BE%D0%B9%D0%BD%D0%B8%D0%BA%D0%B8+%D0%BA%D1%80%D0%B0%D1%82%D0%BA%D0%BE%D0%B5+%D1%81%D0%BE%D0%B4%D0%B5%D1%80%D0%B6%D0%B0%D0%BD%D0%B8%D0%B5&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4753/4753627_sbornik__voprosov__i_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752465_skachat__drayver__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4753/4753729_skachat__fifa__13_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005d432.bin
d5eae5897a2081d0f2384592c3839b08563448ecdca1d752de234df588ec5ec0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D432 8212 bytes
font_01_sfnt_off0005ebbe.bin
bae0cd21d8d39e8155aa52940ad48f935a741568521924d85b928d4cc298ceef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBBE 16048 bytes

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