Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 5ce7bbe9a4eb6a31…

MALICIOUS

RTF / .DOC

4.3 KB
MD5: 55d2b6cbbab43093214d72e7a0e9b8c5 SHA-1: 6033859e7237d51d2906664a222e9a4b1b19c58f SHA-256: 5ce7bbe9a4eb6a3174ea9478adf2d767e64a473b1f67587053c18ff36cbc65a2
180 Risk Score

Malware Insights

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

The RTF document contains embedded OLE objects, specifically triggering the CVE-2017-11882 vulnerability through the Equation Editor. This exploit allows for arbitrary code execution upon activation, indicating a malicious intent to compromise the user's system.

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 2 \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_off00000081.bin
98c96052127c41a56eaa4c6ffd7b3babc4ac157a3e884c46fc3fce1aea2bf6b9		 rtf-objdata-decoded RTF \objdata at offset 0x81 2001 bytes

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