Malicious PDF — malware analysis report

Static analysis result for SHA-256 1620d7474be6358b…

MALICIOUS

PDF

357.9 KB Created: 2015-08-27 10:09:19 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 9302f963e4932331da0ac4c8581e6df9 SHA-1: 36b7d605cbf35c4c82f068fb3827b461d2bd09c1 SHA-256: 1620d7474be6358b2f669a575f96b2c784088f4d1ee408f1ca4d4b03f23a3311
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 explicitly extracted, the presence of a malicious redirector suggests an attempt to lure the user to a site that likely hosts further malicious content or phishing forms. The document body is heavily obfuscated and appears to contain metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9979

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=%D1%88%D0%B0%D0%B1%D0%BB%D0%BE%D0%BD%D1%8B+%D0%B4%D0%BB%D1%8F+%D0%BF%D1%80%D0%B5%D0%B7%D0%B5%D0%BD%D1%82%D0%B0%D1%86%D0%B8%D0%B9+proshow+producer+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771848_skachat__pesni__milen_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4772/4772408_armyanskie__pesni__2014_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4772/4772119_ustanovka__yelektroventilyatora__na_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00054cc9.bin
b7a4c31cd4303778acee6a8b4b6a2b3f56b16d925166ef7c7bf0976c6baeaa0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54CC9 9744 bytes
font_01_sfnt_off00056785.bin
b04e5245aa0045724d5fa133498c7cee92abda775dc2d726d2fd9330411f6ff5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56785 15820 bytes

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