Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 889e48288cfd5a6c…

MALICIOUS

RTF / .DOC

350.5 KB
MD5: 0c3e784fb2f1c15a8c324089e9507b5c SHA-1: 90f63464a77df5532ed16523dc874c68269dfca1 SHA-256: 889e48288cfd5a6c25f3fa5c5271ebf8455a4054f5d7ed8e41f43b4266355338
129 Risk Score

Malware Insights

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

The RTF document contains OLE object data and an \objupdate directive, indicating an attempt to exploit embedded objects. The high-entropy carved artifact suggests a packed or obfuscated payload. While no specific script was extracted, the heuristics strongly suggest a malicious RTF exploiting an embedded object to execute arbitrary code, likely for a second-stage download.

Heuristics 3

  • \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
  • Suspicious extracted artifact info EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000018d9.bin
71829db70943b3ca2d9c74792eb9b2749f1a62845aa65034ce0db49fb542ea26
rtf-objdata-decoded RTF \objdata at offset 0x18D9 64065 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.