Malicious PDF — malware analysis report

Static analysis result for SHA-256 db87fb91ec659a15…

MALICIOUS

PDF

364.6 KB Created: 2015-08-28 17:33:35 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 3120d72b460ec3b4640c18cd16b1ff50 SHA-1: 5b9d749e97174225ccd7e29a6a7ab4d7e05ffa8c SHA-256: db87fb91ec659a15a438d6e7dde00b363b06a04d4099e87ea74290d9e7fe3911
90 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and contains a link to a known malicious redirector. The document body is heavily obfuscated and unreadable, suggesting it is not intended for human consumption but rather to host malicious links. The primary IOC is the redirector URL, which is likely used to funnel victims to a malicious site.

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%81%D1%86%D0%B5%D0%BD%D0%B0%D1%80%D0%B8%D0%B9+%D0%B7%D0%BE%D0%BB%D0%BE%D1%82%D0%BE%D0%B9+%D1%81%D0%B2%D0%B0%D0%B4%D1%8C%D0%B1%D1%8B+%D0%B2+%D0%B4%D0%BE%D0%BC%D0%B0%D1%88%D0%BD%D0%B8%D1%85+%D1%83%D1%81%D0%BB%D0%BE%D0%B2%D0%B8%D1%8F%D1%85&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809143_papka__peredvizhka__vesna_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809211_uninstaller__for__root_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4809/4809179_nokia__suite__36110_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00056a58.bin
56802a800244883d0b7a1610d17092a8f05ca5f1e6c66f5eea2ebdad3ad5a490		 pdf-font-stream PDF embedded font (sfnt) at offset 0x56A58 8600 bytes
font_01_sfnt_off00058317.bin
1d0f7a3cefe6bc17fb8974f077b68515c408992c5dc44b5793721c446296f721		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58317 15632 bytes

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