Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 3e34b05ec9f4e424…

MALICIOUS

RTF / .DOC

110.3 KB
MD5: 57ce34bd4a66505bd0f9c74ccae93cb1 SHA-1: 78ced334a36b41bec3f856a82e3fb7a4537c591e SHA-256: 3e34b05ec9f4e424290f870efea0da126344eba2dc0a36a7f466b5a006c1b429
220 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution

The file is an RTF document containing embedded OLE objects, specifically triggering heuristics related to Equation Editor and OLE activation. ClamAV identifies this as Rtf.Exploit.CVE_2018_0802-6825822-0, indicating exploitation of the CVE-2018-0802 vulnerability. This vulnerability allows for arbitrary code execution when the embedded object is activated.

Heuristics 5

  • 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
  • ClamAV: Rtf.Exploit.CVE_2018_0802-6825822-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Rtf.Exploit.CVE_2018_0802-6825822-0
  • \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_off000000b9.bin
9dd1ebce2bb90b02b7c7ae005a34b511f14a5c3a5de6c1ca9d2e17e39bed328b
rtf-objdata-decoded RTF \objdata at offset 0xB9 37761 bytes