Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 afb9e129d880d795…

MALICIOUS

RTF / .DOC

571.4 KB
MD5: f82665b79ed18a34a01d73dc8d562165 SHA-1: 8f1b593432ec841d79d659a5efc58e66946ed793 SHA-256: afb9e129d880d79551d72a29b7535bc81021da7814091efd0fce491effe3e146
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 and uses an \objupdate directive, indicating an attempt to exploit object activation for code execution. The high-entropy carved artifact suggests a packed or obfuscated payload. While no specific URLs or scripts were extracted, the heuristics strongly point to a malicious RTF dropper designed to execute arbitrary code, likely for downloading further malware.

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_off0000191d.bin
ceb14130530b67c9b6da839f63bd5609d33c17c9201897bce1fc1e0438c15a05
rtf-objdata-decoded RTF \objdata at offset 0x191D 128577 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.