Win.Trojan.Zbot-12272 — RTF malware analysis

Static analysis result for SHA-256 9d1fe594188cb35d…

MALICIOUS

RTF

267.6 KB Authoring application: Msftedit 5.41.21.2509
MD5: 5a873429726ef768e9d0723f1165bc6b SHA-1: 6a538de524b695eb5779c10d521e8303420217e9 SHA-256: 9d1fe594188cb35d4631a8048283f79a36c3279be56758632d3bcdd6be7c6679
262 Risk Score

Malware Insights

Win.Trojan.Zbot-12272 · confidence 95%

MITRE ATT&CK
T1559 Component Object Model Hijacking T1137 DLL Side-Loading T1027 Obfuscated Files or Information

The RTF file contains an embedded OLE object which, upon decoding, reveals a PE header. ClamAV signatures identify this as Win.Trojan.Zbot-12272. The presence of OLE objects and PE headers strongly suggests the file is designed to deliver a malicious executable payload.

Heuristics 7

  • PE header (with DOS stub) in hex data critical RTF_MZ_HEX
    Hex-encoded PE (MZ + DOS stub) found inside RTF — likely an embedded executable payload
  • ClamAV: Win.Trojan.Zbot-12272 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Zbot-12272
  • ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV
    ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
  • Package object class high RTF_OBJCLASS_PACKAGE
    OLE Package object — can wrap arbitrary files
  • OLE object data medium RTF_OBJDATA
    RTF contains 1 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000000f1.bin
aea53465acefc2cf252cbbc5d9087565beae40694b81f38f00b04111d10b1018		 rtf-objdata-decoded RTF \objdata at offset 0xF1 129675 bytes
Detection
ClamAV: Win.Trojan.Zbot-12272
Obfuscation or payload: likely
Carved artifact entropy is 7.47, consistent with packed or encrypted content.

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