Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 d90d4697fca56dcf…

MALICIOUS

RTF / .DOC

109.9 KB Authoring application: Msftedit 5.41.15.1515
MD5: aeb9c6fab784f00a6c2a53b42bc4d112 SHA-1: ad13510655f5130ebd37fa833672082ddc5d346e SHA-256: d90d4697fca56dcf1589a6fb23e28832be3d56fc0bc7eacfeb291122e6c0bb27
300 Risk Score

Malware Insights

MITRE ATT&CK
T1559.001 Component Object Model T1204.002 Malicious File

The RTF document contains embedded OLE object data, specifically a Package object class and a Composite Moniker, which are indicative of malicious intent. Static analysis detected a PE header within the hex data, confirming the presence of an executable payload. ClamAV signatures also identified the file as 'Win.Trojan.Agent-230724', suggesting it is a known trojan.

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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