Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7923381bc1f9130…

MALICIOUS

PDF

353.5 KB Created: 2015-08-27 09:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.2.4 (via Qt 4.8.6)
MD5: 32a9d2b7d45b8eb9b41afec56e26294f SHA-1: f9fd796e7af28e4747cf3b8ef2882b17232a8dda SHA-256: f7923381bc1f91304d0ec9553205759826e2a26cbcc852f401cba3f4813bc06f
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 infrastructure, as indicated by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The ML classifier also strongly flagged this PDF as malicious. The ClamAV detection 'Pdf.Dropper.Agent-9302991-0' further confirms its malicious nature. The primary IOC is the malicious URL embedded within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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-9302991-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-9302991-0
  • 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%B4%D0%B8%D0%B2%D0%B0%D0%BD+%D1%81%D0%B2%D0%BE%D0%B8%D0%BC%D0%B8+%D1%80%D1%83%D0%BA%D0%B0%D0%BC%D0%B8+%D1%87%D0%B5%D1%80%D1%82%D0%B5%D0%B6%D0%B8+%D0%B8+%D1%81%D1%85%D0%B5%D0%BC%D1%8B+%D1%81%D0%B1%D0%BE%D1%80%D0%BA%D0%B8&charset=utf-8
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771982_skachat__mumiy__troll_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771910_opera__mini__dlya_.pdf
    • http://img1.liveinternet.ru/images/attach/c/7//4771/4771888_skachat__igru__kot_.pdf

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005406a.bin
e0ead63ff278cab5eec0216816c69a5c14e8d28a6dd379e1963d4e64ca22e743		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5406A 9436 bytes
font_01_sfnt_off00055ab5.bin
d8ef38415d1da37bf5b2c7280d6ace9d63baae1c7092f6732b0c887b94f6596e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55AB5 14324 bytes

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