Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a7b082b802d9d78…

MALICIOUS

PDF

370.7 KB Created: 2015-08-26 10:13:46 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 4d938e51fca075ed1767f2674494cb30 SHA-1: 83fbca3583ecb99d5d7199000dc661d1666d3408 SHA-256: 4a7b082b802d9d7890641c0d523d7af2645a1004ae8c655e9331e46a71c7ca01
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by multiple heuristics as malicious, specifically for containing a link to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The embedded URL is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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%92%D0%BE%D0%BB%D0%BD%D0%B8%D1%81%D1%82%D1%8B%D0%B5+%D1%83%D0%B7%D0%BE%D1%80%D1%8B+%D1%81%D0%BF%D0%B8%D1%86%D0%B0%D0%BC%D0%B8+%D1%81%D1%85%D0%B5%D0%BC%D1%8B&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751986_ir2104__shema_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751562_zayavlenie__o__razvode_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751845_skachat__splinter__cell_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00058491.bin
b361ca63aacbf5f4e7561ca8f8a299ffde9947999a6fb8c2b251c70463820be6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58491 8036 bytes
font_01_sfnt_off00059bbe.bin
3e10f135454c74a74241aa1bf39629f55b4e16a7a26452e01be8e52e5f093dff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x59BBE 15396 bytes

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