Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ffc8e73dc412ff8…

MALICIOUS

PDF

350.5 KB Created: 2015-08-24 00:31:06 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 0187e63ea3ffc20dd7bc310c630973b3 SHA-1: 8db35edafaba68a1bd99127b96f20269b9b48a53 SHA-256: 8ffc8e73dc412ff8cbc245427ac9baa2cf940cd38253396a889d9fdd010ac7f0
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF contains an embedded link to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves redirecting the user to the malicious URL http://botcraftman.ru/ for further malicious activity.

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%BF%D1%80%D0%B0%D0%B2%D0%BA%D0%B0+%D1%84%D0%BE%D1%80%D0%BC%D1%8B+4%D0%BD+%D0%BE%D0%B1%D1%80%D0%B0%D0%B7%D0%B5%D1%86+%D0%B7%D0%B0%D0%BF%D0%BE%D0%BB%D0%BD%D0%B5%D0%BD%D0%B8%D1%8F&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693451_pesuy__dlya__shkolnogo_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694416_bulag__buryatskiy__film_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694369_uvedomlenie__ob__okonchanii_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00053353.bin
6435f1d59f589b4d2a5194427c6edc5f40288f0959c7a4b032cf23433d984651		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53353 8400 bytes
font_01_sfnt_off00054bdc.bin
4373ff73b7ffa4325b9fb852b1a50a2591d84fc20bc91bb395783edbd22ceca6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54BDC 14484 bytes

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