Malicious PDF — malware analysis report

Static analysis result for SHA-256 e33b58a508fd0c8b…

MALICIOUS

PDF

351.5 KB Created: 2015-08-22 09:09:55 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 11c4d64d39e6bbdd5e75df5e4f275ee5 SHA-1: f31dab09d92741913c9764d4dc9e7c39fe08d797 SHA-256: e33b58a508fd0c8b091328540e23a53a814046aaff812ad473a46c89795ab055
90 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, indicating an attempt to lure the user to a harmful site. The ML classifier also flagged this PDF with high confidence. The document body appears to be garbled, but the presence of the malicious URL is the primary indicator of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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=asus+a7n8x-x+%D0%B8%D0%BD%D1%81%D1%82%D1%80%D1%83%D0%BA%D1%86%D0%B8%D1%8F+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674526_skachat_patch_dlya_gta_4_eflc_1120_rus.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674621_wipeout_smotret_onlayn_na_russkom_yazuyke.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674612_vladimir_lermontov_mantruy_tvoryaschie_schaste_chitat.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000529ba.bin
b034d38987baaad1606c2a1d37d4718bb6b316adc367960f59d0a7bad5d3e5d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x529BA 10852 bytes
font_01_sfnt_off000548bf.bin
7394a479dcd6965f2c22b59d6b6b44a10e6bb97f46d4f4732736c6269f2fa229		 pdf-font-stream PDF embedded font (sfnt) at offset 0x548BF 18160 bytes

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