Malicious PDF — malware analysis report

Static analysis result for SHA-256 24404f91f208957b…

MALICIOUS

PDF

184.6 KB Created: 2015-07-25 11:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 294ad5513f82360c084d4c4690ed6cbe SHA-1: 65355826f57a9be8e5b419e5df86fc3e850ecd6f SHA-256: 24404f91f208957b71f4d3ab48451692606600154e4e37e3da1bd7801a7342e9
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to botcraftman.ru. This indicates the document's primary purpose is to lure the user to a potentially harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is sufficient evidence for a malicious redirector attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7512620-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7512620-0
  • 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+service+pack+3+%D0%B4%D0%BB%D1%8F+windows+xp&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4193/4193921_per_vudman_kastingi_v_rossii_smotret.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4201/4201969_windows_8_skachat_torrent_64_bit_2014_rus_aktivirovannaya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192686_notuy_v_trave_sidel_kuznechik_pianino_dlya_nachinayuschih.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a325.bin
9d8172e920787c4084a153ed66a023cd7d2c15a58436c8cadfe38fa42045f365		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A325 7364 bytes
font_00_sfnt_off00023d33.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23D33 3556 bytes
font_01_sfnt_off00024ab6.bin
9146083ed5a3d9030ddac6c7675e83baa7a1491e8351627e2f527fee06f97e80		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24AB6 14540 bytes
font_02_sfnt_off000277d3.bin
058ef54a7ebc786b143c1651034b23be918416d91973b158f0113cf2a520decb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x277D3 14652 bytes
font_04_sfnt_off0002b8c8.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B8C8 6084 bytes
font_05_sfnt_off0002c85d.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C85D 3752 bytes

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