Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 aa4c81166470cd54…

MALICIOUS

RTF / .DOC

3.6 KB First seen: 2023-10-11
MD5: d81296bb24619db09e065adf00ee9b23 SHA-1: 8fa4da85c674dbc8a35236b3a7bce6922193f883 SHA-256: aa4c81166470cd543efb4e58aa06de47264113d015987918f3499008698685b4
60 Risk Score

Malware Insights

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

The RTF document contains embedded OLE object data, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be automatically activated upon opening, likely leading to the execution of malicious code. The specific exploit mechanism is not detailed, but the presence of these heuristics strongly points to a weaponized document designed for exploitation.

Heuristics 2

  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000091.bin
8c75267f3e8e6e02c8aff3a207c7c2f6565692dfdfc191f8e6ef6880e89dbd0f
rtf-objdata-decoded RTF \objdata at offset 0x91 1719 bytes