Malicious RTF — malware analysis report

Static analysis result for SHA-256 6368366a13737111…

MALICIOUS

RTF

12.1 KB
MD5: e9e15f255956e4fb28e51ebda04747aa SHA-1: 865f00edfae9bb00e79cdb69a524558e749b8cad SHA-256: 6368366a13737111f8db23525b8b11929a08d48ebb832de3d1b610087e4e9fad
180 Risk Score

Malware Insights

MITRE ATT&CK
T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The RTF document contains an embedded OLE object specifically identified as Equation Editor, triggering heuristics related to CVE-2017-11882. This exploit is known to allow for arbitrary code execution when activated, likely through the ".\objupdate" directive. The presence of these indicators strongly suggests an exploitation attempt targeting this vulnerability.

Heuristics 5

  • Equation Editor activation — CVE-2017-11882 related high CVE related CVE_2017_11882_ACTIVATION_RELATED
    RTF decodes to an Equation.3 ProgID and requests OLE activation with \objemb plus \objupdate. This reaches the legacy Equation Editor attack surface used by CVE-2017-11882/CVE-2018-0802 documents, but the malformed MTEF/native payload needed for stronger attribution was not recovered.
  • Split hex Equation Editor ProgID + OLE object critical RTF_EQUATION_EDITOR
    RTF embeds the Equation.3 ProgID as hex bytes near OLE object activation and splits the byte stream with whitespace or an ignorable RTF group. This is an Equation Editor OLE activation surface commonly used by CVE-2017-11882 / CVE-2018-0802 exploit documents.
  • \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
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001bf9.bin
884171d593699c7a6a029617d0dea7333b7094267c027d7835d225eadde0fae0		 rtf-objdata-decoded RTF \objdata at offset 0x1BF9 1873 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.