Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 b640c6322e1f331b…

MALICIOUS

RTF / .DOC

2.6 KB First seen: 2023-01-12
MD5: d7f879da5d1949496071a7b61aa8be39 SHA-1: 58b2243e9b058d2750398ac5943bd91b71d0712c SHA-256: b640c6322e1f331b92abccc466223e1cff2a7a0b3818d5346c29dc6d95c03755
60 Risk Score

Malware Insights

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

The RTF document contains OLE object data and an \objupdate directive, indicating an attempt to exploit a vulnerability by forcing OLE object activation. The specific exploit is not detailed, but the presence of these elements strongly suggests a malicious document designed to trigger an exploit upon opening.

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_off00000081.bin
85af1fa0e4b0862a9d52b6b392977315cb9d6cb4b90d1a79a9e52a40c855bb4a
rtf-objdata-decoded RTF \objdata at offset 0x81 1211 bytes