Malicious PDF — malware analysis report

Static analysis result for SHA-256 309100ab76695f24…

MALICIOUS

PDF

185.5 KB Created: 2015-08-08 10:02:12 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: fd037b7d6a1a8f1c6d97cc2afd5d6976 SHA-1: c61a2be1123b46a1a77188747ba12debdf45cfe3 SHA-256: 309100ab76695f24e896f2d5a69f4321443f46639e7fea3df7e46be7b3db133a
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating it links to known malicious redirector infrastructure. The ML classifier also flagged it with high confidence. The ClamAV detection name 'Pdf.Dropper.Agent-7556090-0' further supports its malicious nature. The primary malicious IOC is the embedded URL, which is likely used to download and execute a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-7556090-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-7556090-0
  • 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%BF%D1%80%D0%B8%D0%B7%D0%B5%D0%BD%D1%82%D0%B0%D1%86%D0%B8%D1%8F+%D0%BF%D0%BE+%D0%BC%D0%B0%D1%82%D0%B5%D0%BC%D0%B0%D1%82%D0%B8%D0%BA%D0%B5+10+11+%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/6//4383/4383756_scenariy_vrucheniya_attestatov_9_klass.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384244_nvidia_geforce_9500_gt_drayver_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384133_windows_7_64_skachat_besplatno_rus_2015_torrent.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002426e.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2426E 3556 bytes
font_01_sfnt_off00024ff1.bin
17f17ce3864e52b347fc3d41538866c47223fc2a250a0b78e9caee326f45fb56		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24FF1 14920 bytes
font_02_sfnt_off00027e4d.bin
852e0b97513280541245978fd928498cf559d741ce43e3f32104dbf5f7a1c2f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27E4D 14468 bytes
font_03_sfnt_off0002a903.bin
d6eab325935ffd8ceb607c4b4497169eddce5fac560c0ceeec4437f819bba3fc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A903 6668 bytes
font_04_sfnt_off0002bc23.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BC23 6084 bytes
font_05_sfnt_off0002cbb8.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CBB8 3752 bytes

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