Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 5f355ff4e457a546…

MALICIOUS

RTF / .DOC

676.6 KB First seen: 2024-09-06
MD5: 91c4aba6e757c1dd6e80828a99a25e0a SHA-1: 9af57c9452a0a3374c55f37d170c7163372e6f64 SHA-256: 5f355ff4e457a546e82cb3dff0b132ab8fdb3b363c071de9e96382a136bdfe57
80 Risk Score

Malware Insights

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

The file is an RTF document containing OLE object data and an instruction to enable editing, which is a common lure for macro-based malware delivery. The heuristic SE_ENABLE_LURE specifically indicates that the document instructs the user to enable macros or editing, a technique used by malware droppers. The presence of OLE object data and the objupdate heuristic suggest the embedded object is intended to be activated, likely to download and execute a secondary payload.

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_off0005513b.bin
f6456e8797ed6539f5fd30c90c4de360ef80aa29c90f807b152e6fe0a32477db
rtf-objdata-decoded RTF \objdata at offset 0x5513B 1605 bytes