Malicious PDF — malware analysis report

Static analysis result for SHA-256 27e94931dffc66b5…

MALICIOUS

PDF

368.3 KB Created: 2015-08-24 01:35:03 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 85c6a990b542312ef2c83aea25a3ffdd SHA-1: d97b8e23c02fa5742f63d34bb52821f1548d49f3 SHA-256: 27e94931dffc66b52d70440b70a356ccd8cbd0e29fa4365a23e80f261ecb50c7
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. While no scripts were extracted, the presence of a malicious URL suggests an attempt to lure the user to a compromised site, likely for further exploitation or credential harvesting. The document's metadata indicates it was generated by wkhtmltopdf, a tool sometimes abused for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%B1%D1%8B%D1%81%D1%82%D1%80%D1%8B%D0%B5+%D1%80%D0%B5%D0%B7%D1%83%D0%BB%D1%8C%D1%82%D0%B0%D1%82%D1%8B+%D1%87%D1%83%D0%B6%D0%B8%D0%BC%D0%B8+%D1%80%D1%83%D0%BA%D0%B0%D0%BC%D0%B8+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/6//4695/4695186_msfo1000__primerov__primeneniya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694327_skachat__programmu_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693486_igo__primo__2015_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057cbd.bin
7b5dac2f76a9b1d0e1da6273295ee847d80e7a373a67627120d7302d8ae679d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57CBD 8364 bytes
font_01_sfnt_off00059532.bin
7fc48baf89ced7280d9afff4ece9a013506b7114ab5886c1580a14b3d3d49d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59532 14268 bytes

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