Malicious RTF — malware analysis report

Static analysis result for SHA-256 2574ac816c73da9f…

MALICIOUS

RTF

25.6 KB
MD5: 76810bdeda9d225d471db8bf46b4da8c SHA-1: 6409453a58210c11b5861641a812c0c40143248a SHA-256: 2574ac816c73da9f0a6830d9f9b8453b86bad0015973df0613edea485915caab
120 Risk Score

Malware Insights

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

The RTF document contains OLE objects with embedded data, and a \objupdate directive forces OLE activation. This indicates an attempt to exploit OLE vulnerabilities to execute embedded code. The high entropy of the Ole10Native stream suggests it may contain a packed or encrypted payload. Without further analysis of the OLE object's content, the exact nature of the payload remains unclear, but the exploit pattern is consistent with malicious code execution.

Heuristics 4

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • \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 2 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00001b6f.bin
e842371af036dec85be04c041b5a27084315d79c99a18dfb877608f3f483b277
rtf-objdata-decoded RTF \objdata at offset 0x1B6F 4184 bytes