Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab622f8629e7a8d…

MALICIOUS

PDF

186.4 KB Created: 2015-08-05 13:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e64c886ad8f90159b9c152af02ea46d1 SHA-1: 6d6a19b7f182f079c998260dfac3567d30fd364e SHA-256: 4ab622f8629e7a8d2d2cd47ad2155ac38ce693caef313ce71b7216a74cff1c00
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 assigned a high probability of maliciousness. The embedded URL points to botcraftman.ru, which is associated with malicious redirectors. No scripts were extracted, and the document body was not sufficiently readable to determine a specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+windows+8+professional+x64+rus+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+2013+iso&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304597_skachat_muuyku_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304492_taisiya_povaliy_skachat_besplatno_mp3.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304554_igrat_sims_4_besplatno.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a7c2.bin
2b4706543893d80ac3e7948ea8df305baeef1568e28b78695db0e3a9ccdb5c3d		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A7C2 8040 bytes
font_00_sfnt_off00024116.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24116 3556 bytes
font_01_sfnt_off00024e99.bin
8ed847dea557f3c5560e1e0467772723ed97b39434a6077e627753f35d33d41b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24E99 14668 bytes
font_02_sfnt_off00027c40.bin
0bb469a2f408f81db316ad356226eb3cee63cd49e410fa202a2191d54dc69361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27C40 14700 bytes
font_04_sfnt_off0002bfb9.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BFB9 6084 bytes
font_05_sfnt_off0002cf4e.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF4E 3752 bytes

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