Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ab87cbe22d8c841…

MALICIOUS

PDF

185.6 KB Created: 2015-07-25 03:13:03 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 9fe24c55c8aea8e6606892ff596f9eec SHA-1: 8c8f4de6ea88c55122320a2a92c2dc7a8e0280e3 SHA-256: 4ab87cbe22d8c841c186bc8df898a98d2cd1d18160e88ac36143d13ffa806ba7
90 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 points to botcraftman.ru, which is associated with malicious redirection. No scripts were extracted, and the document body was heavily truncated, limiting further analysis of the exact 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%A4%D0%BE%D1%82%D0%BE+%D0%B4%D0%B5%D0%B2%D0%BE%D1%87%D0%BA%D0%B8+%D0%BF%D0%BE%D0%B4%D1%80%D0%BE%D1%81%D1%82%D0%BA%D0%B8+%D0%B2+%D1%82%D1%80%D1%83%D1%81%D0%B8%D0%BA%D0%B0%D1%85&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4198/4198102_one_page_checkout_virtuemart_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4196/4196735_sborka_windows_xp_zver_2015_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/5//4185/4185495_maykl_gerber_predprinimatelskiy_mif_audiokniga.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000242c2.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x242C2 3556 bytes
font_01_sfnt_off00025045.bin
60af0163a271c1c067e89608e4d8d92045f6fe848220b2adc51d3e2de18b2ae8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25045 15212 bytes
font_02_sfnt_off00027eef.bin
a6626c0bd3595dc776735a93968cf26fa9368d0e017313712711ccf7ec06347e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27EEF 14532 bytes
font_03_sfnt_off0002a9df.bin
bd541971aa5d56ec6c614cb7c3e294fad8077931810b35840e42684cd90f2a6b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A9DF 6492 bytes
font_04_sfnt_off0002bc77.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC77 6084 bytes
font_05_sfnt_off0002cc0c.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC0C 3752 bytes

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