Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebd5dbfd4d6c9385…

MALICIOUS

PDF

186.0 KB Created: 2015-07-23 20:24:56 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 2703172ad5187e8a3ccc183b185ed879 SHA-1: e94811f3e37d4c6286058f83594246c4031bcae0 SHA-256: ebd5dbfd4d6c9385c95acac7307e1a935901e3e284396c78de93894086fe1175
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, indicating an attempt to deliver a malicious payload. The ML classifier also flagged this PDF with high confidence. 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%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+fl+studio+11+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184311_skachat_bot_dlya_seosprint_2015.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184319_kryak_alavar_2015.pdf
    • http://img0.liveinternet.ru/images/attach/c/5//4184/4184529_klyuch_dlya_windows_8.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a9aa.bin
77df2ed50706ed410a05508f0f8d441a062668f539aeeb4becc9c432435f3815		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A9AA 7076 bytes
font_00_sfnt_off00024284.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24284 3556 bytes
font_01_sfnt_off00025007.bin
da8c2872e89e00b5063645037f7a3179f738ee1d1cb5ea58a1e5d2676a1c4f0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25007 14760 bytes
font_02_sfnt_off00027e43.bin
2047ed5ead425bdc7ddc2fdd713caaf35acaeee0f956d46966676699e84c813e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27E43 14676 bytes
font_04_sfnt_off0002be63.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BE63 6084 bytes
font_05_sfnt_off0002cdf8.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CDF8 3752 bytes

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