Malicious RTF — malware analysis report

Static analysis result for SHA-256 549e09add1997e46…

MALICIOUS

RTF

7.7 KB
MD5: b0cd2f1772c63d0940cb2e352c991b6b SHA-1: 3a738de4f697f43f2261f47a075fb31c071e5b76 SHA-256: 549e09add1997e46ef7380b96d524e577f233f8f39a76b3bc7921023e1aa8de6
220 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1559.001 Component Object Model Hijacking T1059.003 Windows Command Shell

The file is an RTF document containing embedded OLE objects, specifically triggering heuristics related to Equation Editor exploits. The critical ClamAV detection explicitly names Rtf.Exploit.CVE_2018_0802-6825822-0, indicating a known vulnerability in Microsoft Equation Editor is being leveraged. This suggests the primary attack pattern is to trick the user into opening the document, which then exploits CVE-2018-0802 to achieve arbitrary code execution.

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_off000000ca.bin
20e82f0a5ee397054896014bebbbf206fe77cc2462b4f37490f94cc993204c0b
rtf-objdata-decoded RTF \objdata at offset 0xCA 3666 bytes