Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c87efe1ee6c9b9b…

MALICIOUS

PDF

185.4 KB Created: 2015-08-08 12:11:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: be45770312ca7d759dbdedb12078eb33 SHA-1: 4f555711c663f89df486662282807aa943627615 SHA-256: 3c87efe1ee6c9b9b3dd5b87bf7cde37aaf774d6703f64db74bcb94812befb5ff
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier also flagged this file 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=%D0%A1%D0%BB%D0%BE%D0%B2%D0%B0%D1%80%D0%B8+%D0%B4%D0%BB%D1%8F+%D0%B1%D1%80%D1%83%D1%82%D0%B0+%D0%BF%D0%B0%D1%80%D0%BE%D0%BB%D0%B8+%D0%B4%D0%BB%D1%8F+%D0%B1%D1%80%D1%83%D1%82%D0%B0+brutus&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384188_skachat_windows_xp_sp1_rus_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4386/4386622_delovuye_igruy_primeruy.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4388/4388182_kabare_maski_shou_s_delievuym_skachat.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_048_off0002a82b.bin
1dc663bdd5ed242746f45e222e758eecc730826cf11058de998b222e6b5d7866		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A82B 6824 bytes
font_00_sfnt_off000241e4.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x241E4 3556 bytes
font_01_sfnt_off00024f67.bin
a64d853fc8495c3234712b0770d1a1a47ccf20b0aa5122b431dbe4daa06d5742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24F67 14488 bytes
font_02_sfnt_off00027cba.bin
909d9af0bb0c0fd7a24ee3a28fca4c6de1c98634dd77f654abc48189b66ebd35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27CBA 14712 bytes
font_04_sfnt_off0002bbef.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BBEF 6084 bytes
font_05_sfnt_off0002cb84.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CB84 3752 bytes

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