Malicious PDF — malware analysis report

Static analysis result for SHA-256 872d7e7e1a6751e5…

MALICIOUS

PDF

374.4 KB Created: 2015-08-26 10:27:11 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 24d732a7460086b296537a57232b95ae SHA-1: d65e9e1db7bbe271281f6f891b64861057e667e5 SHA-256: 872d7e7e1a6751e5fa3955303e1465abd320714c39235c8c873404e31681a44f
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded link to a known malicious redirector infrastructure, indicating an attempt to lure users to a harmful site. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious URL is a high-confidence indicator of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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%D1%83%D1%82%D0%BE%D1%87%D0%BD%D1%8B%D0%B9+%D1%81%D1%86%D0%B5%D0%BD%D0%B0%D1%80%D0%B8%D0%B9+%D1%81%D0%BA%D0%B0%D0%B7%D0%BA%D0%B8+%D0%B4%D0%BB%D1%8F+%D0%B2%D0%B7%D1%80%D0%BE%D1%81%D0%BB%D1%8B%D1%85&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752083_dzhodzho__moyes__korabl_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752183_skachat__drayver__dlya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752230_proshivka__modema_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00059664.bin
99f7dc1b8f4129655312a96790a68f81c2560bb238c2edb1f6b01854d65a43ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59664 8244 bytes
font_01_sfnt_off0005ae28.bin
edbbcac5fc27ae16ae88d45a3d6600343be39ce92d39229eaafde05f570e7e3d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5AE28 13864 bytes

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