Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ef619a21d3ed396…

MALICIOUS

PDF

376.1 KB Created: 2015-08-28 11:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: a3a9f9c6770963f0f1a2bfd7b50b12c7 SHA-1: 0df789879d3310bb699429f1ba78aba28e97d256 SHA-256: 9ef619a21d3ed3960f51b654d3515e69a657978c7171debdd0d182f48c231f09
150 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link to botcraftman.ru, which is flagged by heuristics. The ML classifier also strongly indicates maliciousness. ClamAV identifies the file as Pdf.Dropper.Agent-8926935-0, suggesting it's a dropper. The embedded URL is the primary indicator of the attack pattern, likely leading to a phishing page or further malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8926935-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8926935-0
  • 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=%D1%83%D1%80%D0%B0%D0%BB%D1%8C%D1%81%D0%BA%D0%B8%D0%B5+%D0%BF%D0%B5%D0%BB%D1%8C%D0%BC%D0%B5%D0%BD%D0%B8+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802438_kren__5__volt_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802600_testuy__po__istorii_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4802/4802393_kak__sdelat__vuykidnoy_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00059e60.bin
6a2a2088da634161e59bf7fa5be4539d3e913708d73b28995f359caf1842da8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59E60 7568 bytes
font_01_sfnt_off0005b426.bin
200d8a25a10d39674d34f1379ac342d9cacc566aedcba4bb603812a30fc13e54		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B426 13976 bytes

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