Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4dcdd443f7f36ec…

MALICIOUS

PDF

185.5 KB Created: 2015-08-08 10:54:33 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e82419783288ea319c981ac17566a25d SHA-1: b4ec89fe46dea717dd8bc98c4e6cb98a7009b630 SHA-256: b4dcdd443f7f36eca6c3213f5ac7625a5bf127a0dcb0d56c909f690e7aa587e6
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, http://botcraftman.ru/, is the primary indicator of malicious intent, likely serving as a gateway to a phishing or malware distribution page. No scripts were extracted, and the document body was truncated, limiting further analysis of the 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=%D0%BA%D1%80%D0%B5%D0%BC%D0%BB%D1%8C+2222+%D1%81%D1%82%D0%B0%D0%BB%D0%BA%D0%B5%D1%80+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+txt&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386443_kak_udalit_internet_explorer_11_v_windows_7.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383742_skachat_splashtop_gamepad_thd_na_android.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383889_vuyzhivshie_2_sezon_skachat_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024133.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24133 3556 bytes
font_01_sfnt_off00024eb6.bin
f7a7aece71b4ded292978fafd7efbffa67c67e0eca0969e88185fc7f37b8b04e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24EB6 15456 bytes
font_02_sfnt_off00027e47.bin
e1416a721d55f07de34fa994a3ec33e5f90210efbd97f864d00b8a5e6f5d0b47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27E47 14644 bytes
font_03_sfnt_off0002a996.bin
900574e2c0263c9d2d01cc82b22d7a554ab90deee7476f7b21b8f8f624b62e94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A996 6472 bytes
font_04_sfnt_off0002bc05.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC05 6084 bytes
font_05_sfnt_off0002cb9a.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB9A 3752 bytes

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