Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e8386f73bf17cbb…

MALICIOUS

PDF

187.3 KB Created: 2015-08-08 12:27:15 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: f7969db366821459c81b06d7952e0ad4 SHA-1: 50dd497f487d7160c072b86eae57a5f988bad084 SHA-256: 9e8386f73bf17cbb7e45af0fa61ddfa0e5c1f2752a33fde09abe101b9776a43a
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 known malicious redirector infrastructure. The embedded URL, http://botcraftman.ru/..., is likely part of a phishing or malware distribution chain. The ML classifier also strongly indicated maliciousness. No scripts were extracted, and the document body was not parsable.

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+%D0%B4%D1%80%D0%B0%D0%B9%D0%B2%D0%B5%D1%80%D0%B0+%D0%BD%D0%B0+%D0%BD%D0%BE%D1%83%D1%82%D0%B1%D1%83%D0%BA+samsung+r540&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386460_minecraft_launcher_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4385/4385236_kompleks_urokov_po_vsem_3d_autocad_skachat_besplatno.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4388/4388450_golicuynskiy_uchebnik_skachat.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002ac64.bin
1b0e3e56d3da61ba1ff4ac8de4a72619eba2c6ec62b6446e4c6301686aba14ac		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2AC64 7704 bytes
font_00_sfnt_off000244a6.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x244A6 3556 bytes
font_01_sfnt_off00025229.bin
b726fc5ae696f73b19b136455344ca304738b8b8bbad2823b2466ed51a966e4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25229 15168 bytes
font_02_sfnt_off000280b9.bin
d4ff67833cc7a3648e2804b377733a267472f966faaa90295b9e5348cf126380		 pdf-font-stream PDF embedded font (sfnt) at offset 0x280B9 14808 bytes
font_04_sfnt_off0002c334.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C334 6084 bytes
font_05_sfnt_off0002d2c9.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2C9 3752 bytes

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