Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a88804e0284ca5f…

MALICIOUS

PDF

186.6 KB Created: 2015-07-23 20:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 2378fb0a1c4fa34bdff85164a0af7382 SHA-1: bc4e582e53aa4292470fe2d9ac4278180c15b3f7 SHA-256: 4a88804e0284ca5fb12393d069c829611e06370d5bcdeafec3e1806980432d9c
92 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector infrastructure at http://botcraftman.ru/. This heuristic firing, combined with the ML classifier's high confidence, indicates the document is designed to redirect users to a potentially harmful site. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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%82%D0%B5%D1%81%D1%82%D0%BE%D0%B2%D1%8B%D0%B5+%D0%B7%D0%B0%D0%B4%D0%B0%D0%BD%D0%B8%D1%8F+%D0%BF%D0%BE+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC%D1%83+%D1%8F%D0%B7%D1%8B%D0%BA%D1%83+4+%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//4183/4183179_lampovuyy_kombik_shema.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4183/4183195_lada_kalina_shema_yelektrooborudovaniya.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184319_kryak_alavar_2015.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024560.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24560 3556 bytes
font_01_sfnt_off000252e3.bin
920baa7d8e61257ae241355f93ed70eb76f2ce175005a50524c2205d4b5d5206		 pdf-font-stream PDF embedded font (sfnt) at offset 0x252E3 15016 bytes
font_02_sfnt_off000281b8.bin
0d6c49bcbef1f65ca5e96f92b5d88c62510c2b9160c1e25cb4b3e80a774467e2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x281B8 14468 bytes
font_03_sfnt_off0002ac6b.bin
a677c407ec3d43935aaef863f276b194decba3ef6fba5936c797ea60e4138ca9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2AC6B 6924 bytes
font_04_sfnt_off0002c07e.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C07E 6084 bytes
font_05_sfnt_off0002d013.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D013 3752 bytes

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