Malicious PDF — malware analysis report

Static analysis result for SHA-256 4dd33d7710fbbf8d…

MALICIOUS

PDF

185.7 KB Created: 2015-08-08 09:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.2.1 (via Qt 4.8.6)
MD5: 23c6146bed9a03684dfa11d2bcb008a3 SHA-1: 2cbbabb065b24e39285f3b77fd881e4f7f7ddccc SHA-256: 4dd33d7710fbbf8d0dfe5e62bc80875aa4143de265cccd4294409aaf5d1012e2
92 Risk Score

Malware Insights

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

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also assigned a high probability of maliciousness. The embedded URL, http://botcraftman.ru/..., is the primary indicator of malicious intent, likely serving as a lure to a phishing or malware distribution site. No scripts were extracted, and the document body was truncated, limiting further analysis of the specific lure.

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%80%D0%B0%D0%B7%D0%BC%D0%B5%D1%80%D1%8B+%D0%B8%D0%BB%D0%B8+%D1%87%D0%B5%D1%80%D1%82%D0%B5%D0%B6%D0%B8+%D0%B0%D0%B2%D1%82%D0%BE+%D0%BE%D0%BF%D1%80%D0%BE%D0%BA%D0%B8%D0%B4%D1%8B%D0%B2%D0%B0%D1%82%D0%B5%D0%BB%D1%8F&charset=utf-8
    • http://fastpic.ru/
    • http://www.liveinternet.ru/click
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383810_darya_doncova_babochka_v_gipse_skachat_besplatno.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4383/4383839_arkon_skachat.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4384/4384030_proshivka_modema_e1550.pdf

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024232.bin
880e53e6f12106514012eaabb19a261b9f8ae03d695445fc59a5b9b5a1293281		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24232 3556 bytes
font_01_sfnt_off00024fb5.bin
5e231961bc1d8826959bcae77d4cbf92dbf4f65d2c48546a09905949227d97fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x24FB5 14932 bytes
font_02_sfnt_off00027e54.bin
c457fcfaab6f548331a7572fefd0d96ae260c7787e9dff2b51ae1aa36573dbb9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x27E54 14468 bytes
font_03_sfnt_off0002a903.bin
66e0e4bd0b0198e9d398818d5ef4d64bd0cfbe2e66377cac090e2ee51bb6da5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A903 6944 bytes
font_04_sfnt_off0002bd13.bin
819f9cc5156bfe3dae03045446d677a19b5879270357875344f9514601da73e3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2BD13 6084 bytes
font_05_sfnt_off0002cca8.bin
9364d8c42993f0db1eb41a63b15a48dd56cef5056a611ab8e91dd81183a5a95e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2CCA8 3752 bytes

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