Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 1872f775cf8e1d48…

MALICIOUS

RTF / .DOC

3.6 KB First seen: 2023-10-10
MD5: bdd700985309b36f8972e26f729013c9 SHA-1: 86a74b247ef7fa48486aa5720124f4613901fc43 SHA-256: 1872f775cf8e1d48c3cf8e3f66656fbec2853dab26a4b39f3ab258b0d9487a8b
100 Risk Score

Malware Insights

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

The RTF document contains embedded OLE objects that are automatically linked and updated, indicating an attempt to exploit vulnerabilities within Microsoft Office applications. The presence of `RTF_OBJDATA`, `RTF_OBJAUTLINK`, and `RTF_OBJUPDATE` heuristics strongly suggests a malicious intent to leverage these embedded objects for exploitation.

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_off0000008d.bin
90bf23137f37e2cb856768c1e8a250bca65677769e8eaefc79ba6b54adbb723d
rtf-objdata-decoded RTF \objdata at offset 0x8D 1738 bytes