Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 cd46c4f83fbc7e89…

MALICIOUS

RTF / .DOC

107.2 KB
MD5: f3d6b67e7f860bca2edb6bf24ef97d0f SHA-1: 785dc2d018316608baa80d59dd182135f64b3df3 SHA-256: cd46c4f83fbc7e8916ad014719d419efacda3d446939c801b709802a0de9d05b
100 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains embedded OLE objects that are automatically updated and activated upon opening. This mechanism is designed to execute arbitrary code, likely to download and run a secondary payload. The presence of `RTF_OBJDATA`, `RTF_OBJAUTLINK`, and `RTF_OBJUPDATE` heuristics strongly indicates this malicious behavior. No specific family could be identified, but the technique is common for initial access.

Heuristics 3

  • Automatically linked OLE object high RTF_OBJAUTLINK
    RTF contains \objautlink — an automatically linked OLE object surface that can be updated or activated when Word opens the document.
  • \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_off000006d5.bin
d749b17e0908821418f1c23e8c1f2826794d2e8237a7a5567e6c53df753557f3
rtf-objdata-decoded RTF \objdata at offset 0x6D5 4685 bytes