Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa5a7c417bd3636…

MALICIOUS

PDF

183.7 KB Created: 2015-08-05 22:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: d0f435f23ac3f425b380ed0891dfc57d SHA-1: 7c020b30d4eff6887df4b74a8c759a1a28f960fe SHA-256: aaa5a7c417bd36369d2bbf97985fb15f4af72c94acf239fe39fd5776847b03db
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a critical finding for a malicious redirector link pointing to botcraftman.ru. The ML classifier also assigned a high probability of maliciousness. This indicates the document is likely a dropper or lure designed to redirect users to malicious infrastructure.

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-8799124-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8799124-0
  • 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%BC%D0%BC%D0%BC+%D1%82%D0%B5%D0%B9%D1%81%D1%82%D0%B8+%D0%B4%D0%BB%D1%8F+%D0%B0%D0%BD%D0%B4%D1%80%D0%BE%D0%B8%D0%B4&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4308/4308132_olimpiada_po_russkomu_9_klass_2015_otvetuy.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4306/4306846_shema_podklyucheniya_stekloochistitelya_vaz_2106.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4304/4304706_chistuyy_ponedelnik_skachat_epub.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00023d1d.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23D1D 3556 bytes
font_01_sfnt_off00024aa0.bin
1aabdd0248353b05e115cc38b3e75293ff4d3c31e069d90e7c203350f6f6a47c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24AA0 14548 bytes
font_02_sfnt_off0002785a.bin
dde8cb3db78f49492d397de1013a074ab9c596bc0508faa33f94bd64189db0ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2785A 14468 bytes
font_03_sfnt_off0002a30d.bin
db5e5202dabb7aea16870c41c9462ca96b87a9015f937c52a991a097c2e82d1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A30D 6384 bytes
font_04_sfnt_off0002b513.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2B513 6084 bytes
font_05_sfnt_off0002c4a8.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2C4A8 3752 bytes

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