Malicious PDF — malware analysis report

Static analysis result for SHA-256 f133b8a281facd75…

MALICIOUS

PDF

365.1 KB Created: 2015-08-20 08:44:14 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: cdb6ccabea8e49fd02d7e716649eb1c0 SHA-1: 17e05be83b8b54a5ae01b63eff990cf993e5307b SHA-256: f133b8a281facd75338805ac6907f82a3d790fd33c705312da322779b90263f6
90 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link

The PDF file was flagged by a critical heuristic for linking to known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness. The primary malicious IOC is the URL http://botcraftman.ru/, which is likely used to direct users to a harmful destination. No scripts were extracted, and the document body was unreadable, but the presence of the malicious link is sufficient evidence of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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%BF%D1%80%D0%BE%D0%B3%D1%80%D0%B0%D0%BC%D0%BC%D1%83+%D0%B4%D0%BB%D1%8F+%D0%B8%D0%B7%D0%BC%D0%B5%D0%BD%D0%B5%D0%BD%D0%B8%D1%8F+%D0%B3%D0%BE%D0%BB%D0%BE%D1%81%D0%B0+%D0%BD%D0%B0+%D1%80%D1%83%D1%81%D1%81%D0%BA%D0%BE%D0%BC+%D1%8F%D0%B7%D1%8B%D0%BA%D0%B5&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4640/4640174_aktivator_windows_7_loader_extreme_edition_skachat.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639115_skachat_igru_ezda_na_russkih_mashinah_po_rossii_cherez_torrent.pdf
    • http://img1.liveinternet.ru/images/attach/c/6//4639/4639453_chelovek_sinyak_skachat_torrent.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00057162.bin
ddaf74773cf66108fff62c009bed663c31e262f983bf22fc0629693661c54d0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57162 8340 bytes
font_01_sfnt_off0005896c.bin
814ef19a94f873e9750d7fb76c5977ee4ace9c1e1de4d8cc0579cfb4eeef7458		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5896C 14140 bytes

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