Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f4be8f2e049df5…

MALICIOUS

PDF

358.4 KB Created: 2015-08-22 08:52:06 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 1236c24f6f51869371144a7e1c2692a6 SHA-1: 20a242f09b4ebc8f7aae69eb3e28e8cadaf886f3 SHA-256: c0f4be8f2e049df5db965a2a01af9ff03d868d8e41caecc20289de0ec35b5e52
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, botcraftman.ru, which is disguised as a download for Microsoft Office 2007. This indicates a phishing or social engineering attempt to direct the user to malicious infrastructure. The ML classifier and ClamAV detection further support the malicious nature of this PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 3

  • 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.
  • ClamAV: Pdf.Dropper.Agent-8937204-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-8937204-0
  • 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%D0%B9%D0%BA%D1%80%D0%BE%D1%81%D0%BE%D1%84%D1%82+%D0%BE%D1%84%D0%B8%D1%81+2007+%D1%81%D0%BA%D0%B0%D1%87%D0%B0%D1%82%D1%8C+%D0%B1%D0%B5%D1%81%D0%BF%D0%BB%D0%B0%D1%82%D0%BD%D0%BE+%D0%B1%D0%B5%D0%B7+%D0%BA%D0%BB%D1%8E%D1%87%D0%B0&charset=utf-8
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674476_cronos_baza_dannuyh_torrent.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674458_skachat_lyubimuye_buyvshimi_ne_buyvayut.pdf
    • http://img0.liveinternet.ru/images/attach/c/6//4674/4674462_tkp_45104372008_skachat.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000551c4.bin
4357f66a308c9855ec20010122de2bdd1898dc5a516671479f92856ce9db84f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x551C4 8040 bytes
font_01_sfnt_off0005691f.bin
e635bc99619fcdb8ab790e596c068e78910104c9647a545e26ba3f0e53146399		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5691F 15512 bytes

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