Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 cd9195a9fab06c84…

MALICIOUS

RTF / .DOC

84.0 KB
MD5: 212df1aef8f8b23361e9b0b385e6bc2e SHA-1: 2b953ab7485560a0d645886d26b200c470b8bd6d SHA-256: cd9195a9fab06c84887945db107a1e2bf404cbbce9e28495e124cee656e98924
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains embedded OLE objects, specifically triggering heuristics related to Equation Editor vulnerabilities and OLE object activation. This strongly suggests an exploit targeting Microsoft Equation Editor to achieve arbitrary code execution. No document body or scripts were extracted, but the heuristics alone are sufficient to identify the attack vector.

Heuristics 4

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • 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 2 \objdata section(s) — embedded OLE objects

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001629.bin
a8d880315b14fd08878b601f30001a7638c9dea78f8f7cc19771301fb8031a66
rtf-objdata-decoded RTF \objdata at offset 0x1629 4177 bytes