Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 c188abe106745741…

MALICIOUS

RTF / .DOC

109.9 KB Authoring application: Msftedit 5.41.15.1515
MD5: 2c9181879b138e883b536e54a789fe4b SHA-1: c146a26907adf7d3f4db1a499f667dce14af2e2c SHA-256: c188abe106745741f6b9df94328ae9b8918b8fec645e9c403cb458f89ce07061
300 Risk Score

Malware Insights

MITRE ATT&CK
T1559.002 Component Object Model Hijacking T1204.002 Malicious File

The RTF document contains an embedded OLE object with a Package object class and PE header in its hex data, strongly indicating a malicious executable payload. ClamAV detections confirm this, identifying it as Win.Trojan.Agent-230724. The presence of OLE object data and Composite Moniker suggests an attempt to exploit OLE object handling for code execution.

Heuristics 7

  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • 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.Agent-230724 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Win.Trojan.Agent-230724
  • 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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000000cf.bin
39a3e5966b0d0d8f0cb52c2d7c72cb589d10cc93675bdf0eebe4eed5dc9e3c22		 rtf-objdata-decoded RTF \objdata at offset 0xCF 50974 bytes
Detection
ClamAV: Win.Trojan.Agent-230724
Obfuscation or payload: unlikely

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