Malicious PDF — malware analysis report

Static analysis result for SHA-256 c81868f0b46dff77…

MALICIOUS

PDF

341.1 KB Created: 2015-08-24 00:13:59 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6) First seen: 2021-11-20
MD5: 7d840e7b9dffdd07670156bbb9c2cfa3 SHA-1: 61fc0315bbe5077df358dccb9423f57fc464529a SHA-256: c81868f0b46dff77b71729f170690e6308c5268fc7dbbfd9504f7b147b3528a0
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link that redirects to a known malicious domain, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely used to deliver a secondary payload or conduct phishing activities. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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%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+%D1%87%D0%B8%D1%82+%D0%BD%D0%B0+%D0%BA%D0%BE%D1%80%D0%BE%D0%BD%D0%BA%D0%B8+%D0%B2+%D0%BB%D0%B8%D0%B3%D0%B8+%D1%81%D0%BA%D0%BE%D1%80%D0%BE%D1%81%D1%82%D0%B8&charset=utf-8 In PDF document text
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693963_biznes__planuy__skachat_.pdfIn PDF document text
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693282_50__ottenkov__svoboduy_.pdfIn PDF document text
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694063_navi__600__russia_.pdfIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000510ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x510EE 7856 bytes
SHA-256: adc60439f7cfaa28439ef07ab3f4b79e3b5e192bc6a01f4938862c5ee5394881
font_01_sfnt_off00052800.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52800 14092 bytes
SHA-256: d277a115c28f32d1257047a2736e203510401d8cb77e5538f72217d6431a15fd

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