Malicious RTF — malware analysis report

Static analysis result for SHA-256 27427a904391653f…

MALICIOUS

RTF

610.8 KB First seen: 2024-08-09
MD5: 5f04749efc3d57d3a4d63e28d44eb4d9 SHA-1: e1bb4bec5b967adc72e2c6c35d906c264a5e679c SHA-256: 27427a904391653fff86cc4d9a3c54645b932556bf1c14c65dbacebbbcf159f2
80 Risk Score

Malware Insights

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

The RTF file contains OLE object data and uses an \objupdate directive, indicating it's designed to activate embedded objects. The heuristic 'SE_ENABLE_LURE' confirms the document instructs the user to enable editing, a common tactic for malware droppers to bypass security measures. The document body discusses financial audits to appear legitimate, masking the malicious intent.

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_off000568c9.bin
68d0853545ed4dd1c87901d773beb48c3d2832dea1053f356e2e07464b7aa909
rtf-objdata-decoded RTF \objdata at offset 0x568C9 1598 bytes