Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 71c7ce3ae15af93c…

MALICIOUS

RTF / .DOC

1.79 MB
MD5: 991c3ef3605df4ffc60c31c48747fec9 SHA-1: 723ebd382ae7f1d0a12aa4dc8f63885814ec7bbf SHA-256: 71c7ce3ae15af93c31891bfb40543074c2ea5a51f34ff3c13e52c68d1e020053
100 Risk Score

Malware Insights

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

The file is an RTF document containing embedded OLE objects, with a specific heuristic indicating that \objupdate forces OLE activation. The document body contains a lure instructing the user to 'enable editing' to bypass security warnings. This suggests the document is designed to exploit user interaction to execute embedded malicious content, likely an exploit or a downloader.

Heuristics 4

  • \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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000fbef5.bin
5d3d88e36c238025d3468758b4f1205c88b0ad43761a4da38394a79e8994d172
rtf-objdata-decoded RTF \objdata at offset 0xFBEF5 4263 bytes