Malicious PDF — malware analysis report

Static analysis result for SHA-256 b53211c808ef4f19…

MALICIOUS

PDF

345.2 KB Created: 2015-08-24 03:37:36 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: f5056d0fab96160dbf9da71fbf880b54 SHA-1: 62f65ec42e031c9b33ca8fbda6c6b26c24273e7c SHA-256: b53211c808ef4f1976c1ac294361b21f440ae0bf24528913d9ed95f282415028
90 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 http://botcraftman.ru/... is confirmed as a redirector, suggesting the document's primary purpose is to lure users to a malicious site. No scripts were extracted, and the document body was unreadable.

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=%D1%82%D0%B5%D0%BA%D1%81%D1%82+%D0%BF%D0%B5%D1%81%D0%BD%D0%B8+%D0%B2%D0%B8%D1%82%D1%8F+%D0%BC%D0%B0%D1%82%D0%B0%D0%BD%D0%B3%D0%B0+%D0%B4%D0%B2%D0%B0+%D0%BA%D1%80%D1%8B%D0%BB%D0%B0&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694875_stepmaniya__na__russkom_.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4694/4694492_microsoft__office__2015_.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4693/4693754_skachat__logotip_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00051c63.bin
30d47d962fb87fcceb9a0234bcb89d2ee9b9e7de852ab300b6483344285f7c62		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51C63 8872 bytes
font_01_sfnt_off00053455.bin
8082c51e5d9d05ce5db12a023dc067c4b1633a6738f4deeab8f352b869f410b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53455 15800 bytes

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