Malicious RTF — malware analysis report

Static analysis result for SHA-256 667a53cc4d5c8428…

MALICIOUS

RTF

25.6 KB First seen: 2023-05-24
MD5: d251d3dc70ec562e6e92ac28c05f1aa9 SHA-1: bc2ec69d8ac02bd3b7aea3573848fa1169cceb83 SHA-256: 667a53cc4d5c8428f4da74f07e018bde991b06288f96532ae7a21dce1f161e13
60 Risk Score

Malware Insights

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

The RTF document contains OLE object data and uses an \objupdate directive, indicating an attempt to exploit OLE object activation. This is a common technique for delivering malicious payloads. The high-severity heuristic firing on \objupdate strongly suggests an exploit attempt, likely leading to arbitrary code execution.

Heuristics 2

  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001303.bin
7fe78f1c4534a8d4a0e3a2429f2bb51301139064f41d765fd2bf326882617d7d
rtf-objdata-decoded RTF \objdata at offset 0x1303 4177 bytes