Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b720f73fbd3d0d3…

MALICIOUS

PDF

352.1 KB Created: 2015-08-26 10:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 155bd05750a1b089e41c1d9bbf35152c SHA-1: 6af48c48e4d86c7a3ff12c1d332d39b103ba7809 SHA-256: 2b720f73fbd3d0d3da6c8134a0e234bff4ef10fc7ca38d5e3869ed7e1f411f5e
92 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 the primary indicator of compromise. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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%A0%D0%B0%D1%81%D0%BF%D0%B8%D1%81%D0%B0%D0%BD%D0%B8%D0%B5+%D0%B0%D0%B2%D1%82%D0%BE%D0%B1%D1%83%D1%81%D0%BE%D0%B2+%D0%BA%D0%B0%D1%80%D0%B0%D0%B8%D0%B4%D0%B5%D0%BB%D1%8C+%D1%83%D1%84%D0%B0+%D0%BE%D1%82%D0%BF%D1%80%D0%B0%D0%B2%D0%BB%D0%B5%D0%BD%D0%B8%D0%B5%D0%B3%D1%80%D0%B0%D1%84%D0%B8%D0%BA&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4751/4751674_koyefficient__ayerodinamicheskogo__soprotivleniya_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752451_skachat__microsoft__word_.pdf
    • http://img0.liveinternet.ru/images/attach/c/7//4752/4752583_skachat__poshluye_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000536d7.bin
2120e656f21691808da69cb34b22ea6c315dfb4a2bb0faa8172cd557c569b4d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x536D7 8048 bytes
font_01_sfnt_off00054e4a.bin
d8adeca849eabb2b980e986fadf1143c732b5ad59a3e1274476130e4db929111		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54E4A 16296 bytes

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