Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 a9774fd16be14777…

MALICIOUS

RTF / .DOC

571.4 KB
MD5: 0745dc458a74f72ad039fa42490f707a SHA-1: df2106969f24177a5eab2395133e7e55f6b54694 SHA-256: a9774fd16be147772d323568f1db15cfbb8275e4462d9356c0509c33d816e8fa
129 Risk Score

Malware Insights

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

The RTF document contains embedded OLE object data, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be activated automatically, which is a common technique for exploiting vulnerabilities in older Office versions. The extracted artifact 'objdata_00_off0000195c.bin' is likely the exploit payload. The lack of readable document body text or scripts makes it difficult to determine the exact final payload or delivery mechanism, hence the lower confidence.

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_off0000195c.bin
d3b14f8c0ad70dbd0811d93c82d3ee557d43b483ab91377f062e37e58fdb7544
rtf-objdata-decoded RTF \objdata at offset 0x195C 128561 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.