Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bcf13923a5d0f29…

MALICIOUS

PDF

347.2 KB Created: 2015-08-19 14:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 13e79968e3a8d91f6a2fb42988400c7b SHA-1: dd5a31b7397e1562cedeb6924e3ab2f9af192f38 SHA-256: 1bcf13923a5d0f29f17445211381104870afee437069fcc5469f87ea1a9f4859
90 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 lure the user to a harmful site. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the primary indicator of malicious intent.

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=%D0%BC%D0%B0%D1%84%D0%B8%D1%8F+3+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D1%82%D0%BE%D1%80%D1%80%D0%B5%D0%BD%D1%82+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%B0%D1%8F+%D0%B2%D0%B5%D1%80%D1%81%D0%B8%D1%8F&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626853_matematika_3_klass_peterson_rabochaya_tetrad_1_chast_otvetuy.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626827_tureckiy_serial_serebro_cherez_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4626/4626808_kazaki_2_bitva_za_evropu_skachat_torrent_dlya_windows_8.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000524b8.bin
26b6cfa0432f310ac2625501ca48958b6e84338d9638ec9cf33bb43ff6bd8541		 pdf-font-stream PDF embedded font (sfnt) at offset 0x524B8 8424 bytes
font_01_sfnt_off00053d3e.bin
420c59ff65dbde766fab1d8c0f88f0fd70f4ffa91d2134fbd562f99820d6ccc2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x53D3E 15220 bytes

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