Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 3cb3fce6c7a964f0…

MALICIOUS

RTF / .DOC

83.4 KB
MD5: 308fc2b79dc5223fa31224322a6a9fce SHA-1: 431b986567f885fd770e3ba986ef2cfb9119e958 SHA-256: 3cb3fce6c7a964f08dd2d0bf62faed7a13be8ea1c6ec248813c66adb174efd74
120 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The sample is an RTF document that contains an embedded OLE object, specifically triggering the Equation Editor vulnerability (RTF_EQUATION_EDITOR). The ".objupdate" heuristic indicates that this embedded object is designed to be activated automatically, leading to code execution. The embedded object data itself is likely a secondary payload or exploit stage.

Heuristics 3

  • Equation Editor CLSID critical RTF_EQUATION_EDITOR
    Equation Editor OLE CLSID found inside an OLE object — exploited by CVE-2017-11882 / CVE-2018-0802 / CVE-2018-0798
  • \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 1 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000f1e.bin
9b108d70eb8282646e12e047e3d03c11e9f0f27994aef9294e62a05df129877f		 rtf-objdata-decoded RTF \objdata at offset 0xF1E 4708 bytes

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