Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 29327d8089389d96…

MALICIOUS

RTF / .DOC

535.4 KB
MD5: 4ef6b1fa16f352e1969080579b832ee3 SHA-1: d4b85b188ad50ef69c1a238b979a1db7f0d4970d SHA-256: 29327d8089389d96e7ae1abcbd7c300ab587c59fa5841b748ef47e279d0c526b
160 Risk Score

Malware Insights

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

The RTF document contains multiple OLE objects, with high-confidence heuristics indicating the use of automatically linked objects and ".objupdate" directives to force OLE activation. This suggests the document is designed to exploit vulnerabilities in OLE object handling to execute embedded code. No document body or scripts were extracted, limiting further analysis of the specific payload.

Heuristics 5

  • 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.
  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \objupdate forces OLE activation high RTF_OBJUPDATE
    RTF contains \objupdate — forces automatic OLE object instantiation when the document is opened, bypassing user interaction. Almost exclusively seen in Equation Editor exploit documents.
  • OLE object data medium RTF_OBJDATA
    RTF contains 3 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000007de.bin
eea6a25a6bcc31c0ca8d4e6915418ec6fabc1d6cf3dc3265c69770cadbe6b8ff		 rtf-objdata-decoded RTF \objdata at offset 0x7DE 171538 bytes
objdata_01_off00057a3d.bin
9d9bc825f2fa5e0ed8db7dce6823e199ad9c775873472d42887214589f205470		 rtf-objdata-decoded RTF \objdata at offset 0x57A3D 2632 bytes
objdata_02_off00058fe0.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037		 rtf-objdata-decoded RTF \objdata at offset 0x58FE0 12297 bytes

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