Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 3c6ae8efbcefb001…

MALICIOUS

RTF / .DOC

184.9 KB First seen: 2023-10-25
MD5: 25bcd2208a91c54188db2ead7ef3850b SHA-1: f48ac1e81ad4cbc17ab73dc10aa1cec5bdfdbc95 SHA-256: 3c6ae8efbcefb0017125b2a36538fa391f9b77d9ccceb6e729ae0b0354c0ff94
80 Risk Score

Malware Insights

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

The sample is an RTF document that contains OLE object data and an instruction to enable editing, which is a common lure for malware execution. The document body discusses financial audits and internal controls, likely as a pretext to trick the user into enabling malicious content. The presence of OLE object data and the SE_ENABLE_LURE heuristic strongly suggest the document is designed to execute a secondary payload upon user interaction.

Heuristics 3

  • \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
  • 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_off00003a3f.bin
9fb90ea302245076dc635924eb463afff1c3f1e19b8689edaca60f1ac2a3eeca
rtf-objdata-decoded RTF \objdata at offset 0x3A3F 1750 bytes