Malicious PDF — malware analysis report

Static analysis result for SHA-256 289363cfb811421b…

MALICIOUS

PDF

368.6 KB Created: 2015-08-24 04:32:55 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: e816c07bd91a494574a20a6b743358ad SHA-1: 9d91991cb606225816965914cb99385870191b25 SHA-256: 289363cfb811421b7f88695058f035b3ae9dc5520e38f0dd0866fe8aee86c719
92 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 strongly indicated maliciousness. The embedded URL points to 'botcraftman.ru', which is associated with malicious redirects. No scripts were extracted, but the presence of a malicious link is sufficient evidence of a malicious intent, likely to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9946

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=plants+vs+zombies+2+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%BF%D0%BE%D0%BB%D0%BD%D1%83%D1%8E+%D1%80%D1%83%D1%81%D1%81%D0%BA%D1%83%D1%8E+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8E&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4696/4696086_apm__civil__engineering_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4699/4699869_video__uroki__seksa_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693515_zadachi__po__matematike_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000577a8.bin
27cae28d7fac8a454c88230208e67fab2c02515b6920a86de6725c57b1043b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x577A8 10356 bytes
font_01_sfnt_off000594c1.bin
ad83c238c748ddc340133419cdb4b592ffa31dcd15235cba40e3e48f209134e7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x594C1 15148 bytes

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