Malicious PDF — malware analysis report

Static analysis result for SHA-256 f8aaf6a7ab1a94ef…

MALICIOUS

PDF

186.3 KB Created: 2015-08-08 09:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: e1038ff5bf9236585aeac56957363c92 SHA-1: cf430fcd0346519ad996d39621081ca0f766242d SHA-256: f8aaf6a7ab1a94ef40173547ff1c91127dafe928335fffa8eb3b9f13c1a0f925
92 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing indicating a link to known malicious redirector infrastructure. The ML classifier also flagged the PDF with high confidence. The embedded URL 'http://botcraftman.ru/?lip&keyword=%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B4%D1%80%D0%B0%D0%B9%D0%B2%D0%B5%D1%80+%D0%BD%D0%B0+%D0%B7%D0%B2%D1%83%D0%BA+%D0%B4%D0%BB%D1%8F+windows+xp&charset=utf-8' is the primary indicator of malicious intent, likely serving as a lure for users to download unwanted software or visit phishing sites.

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+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B4%D1%80%D0%B0%D0%B9%D0%B2%D0%B5%D1%80+%D0%BD%D0%B0+%D0%B7%D0%B2%D1%83%D0%BA+%D0%B4%D0%BB%D1%8F+windows+xp&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384202_skachat_klesh_of_klens.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384140_iata_koduy_gorodov.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383787_triton_akvariumnuyy_soderzhanie.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a867.bin
1f8b1539eb63590f3b6c2148c7c0d1d1e3f7f8406f1ba75b9584bd3eba26af7c		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A867 7804 bytes
font_00_sfnt_off00024265.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24265 3556 bytes
font_01_sfnt_off00024fe8.bin
c8e18ab38990410c78c8a86ae3574d720f512ad3198f54e820879a12e9e9cc36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24FE8 14408 bytes
font_02_sfnt_off00027d39.bin
1091b4b8d48a8ce1027c776f27791d9202155ca7b76db25bb73195ecd5f5c327		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27D39 14604 bytes
font_04_sfnt_off0002bf7b.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BF7B 6084 bytes
font_05_sfnt_off0002cf10.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CF10 3752 bytes

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