Malicious PDF — malware analysis report

Static analysis result for SHA-256 91a021af4c82a859…

MALICIOUS

PDF

185.5 KB Created: 2015-07-24 23:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: b14441872574071e35870f3ce919e6fe SHA-1: 6061aee280a32051bcf7d799d4749fb0c265e7d2 SHA-256: 91a021af4c82a859f8d2d263d273e56635b76108d305a5e9336a640a42493da2
90 Risk Score

Malware Insights

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

The PDF was flagged by a critical heuristic for linking to a known malicious redirector. The ML classifier also assigned a high probability of maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, and the document body was not sufficiently readable to provide further context.

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=%D0%BA%D0%B0%D0%BA+%D1%80%D0%B5%D1%88%D0%B0%D1%82%D1%8C+%D0%B7%D0%B0%D0%B4%D0%B0%D1%87%D0%B8+%D0%BF%D0%BE+%D0%B3%D0%B5%D0%BE%D0%BC%D0%B5%D1%82%D1%80%D0%B8%D0%B8+7+%D0%BA%D0%BB%D0%B0%D1%81%D1%81&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185601_jetclean_pro_klyuchzip.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4192/4192581_analiticheskaya_spravka_po_rezultatam_monitoringa_v_dou.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4186/4186594_skachat_barbi_sportivnaya_gimnastika_cherez_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000241f2.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x241F2 3556 bytes
font_01_sfnt_off00024f75.bin
1185a5b5f8e09eaa002e5fbc26956f84a7b6bceb4ec1453906ffa80fdd85ac08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24F75 14920 bytes
font_02_sfnt_off00027da9.bin
ebe9d6c1f0c7d129220d2c9c9ba06210f235c06590c8e3dd7cd0afff26a15b93		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27DA9 14568 bytes
font_03_sfnt_off0002a8a9.bin
b2a7dcabd5d6d00e75ff65ea96814a5712eb81401a0b031c3ad09a1f090d37ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A8A9 6804 bytes
font_04_sfnt_off0002bc37.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC37 6084 bytes
font_05_sfnt_off0002cbcc.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBCC 3752 bytes

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