Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 626af71bc07d7aff…

MALICIOUS

RTF / .DOC

112.1 KB First seen: 2023-02-13
MD5: 0fb50fb4a5a92a63dafcc00cbc4e06ce SHA-1: bf27893dcba132edc5bb25aac457b6eabe91b856 SHA-256: 626af71bc07d7aff8c644cdaca69be738076504d625e89862b847f9a14a8e044
60 Risk Score

Malware Insights

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

The file is an RTF document containing an embedded OLE object, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be automatically activated upon opening, which is a common technique for exploiting vulnerabilities in older Office versions. The specific exploit is not detailed, but the presence of these indicators points to a malicious document designed to deliver a payload.

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_off0000006f.bin
3fd4a46a2d958fcd0742d915b7b78a328f6fa941d46b62b4957f702c9c7ae2cd
rtf-objdata-decoded RTF \objdata at offset 0x6F 39086 bytes