Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 4eb6718dd20bea91…

MALICIOUS

RTF / .DOC

13.4 KB First seen: 2022-08-25
MD5: 2245ea5d918568d8ad2885bb9a9946eb SHA-1: a860aa280ce7117fe13fa022a6a2babddfd1ea42 SHA-256: 4eb6718dd20bea912aa83530a56c02d68013ea187113c9501ab0ec97e9b6bfa0
80 Risk Score

Malware Insights

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

The RTF document contains OLE object data and uses an \objupdate directive, indicating it's designed to activate embedded objects. The 'SE_ENABLE_LURE' heuristic confirms the document instructs the user to enable editing and macros, a common tactic for malware droppers. The presence of a large, obfuscated string at the end of the document body suggests it may contain a payload or further instructions.

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 2 \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_off000006e7.bin
fe41b56b658b405f2d16f5bf3b611c151ff0307044b00f4d2234f789d7ae7456
rtf-objdata-decoded RTF \objdata at offset 0x6E7 3778 bytes