Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 fd4e52557f511c59…

MALICIOUS

RTF / .DOC

435.0 KB
MD5: b5be29921304476377e096c60a3fb418 SHA-1: 653d40c3e86feb11b1cc6b7745257754c296c109 SHA-256: fd4e52557f511c596e0d0ff58a1a7775a1295889461b73856d4aa733108e7b58
178 Risk Score

Malware Insights

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

The RTF document contains embedded OLE objects, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that these objects are designed to be automatically activated upon opening the document, likely exploiting a vulnerability to execute arbitrary code. The presence of a suspicious extracted artifact further supports this. The exact nature of the payload is not discernible from the provided evidence, but the mechanism points to a malicious document designed for exploitation.

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 2 \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_off00001880.bin
919b16f4ac1de50e3e6e00053906d109ce71ef1ec9bc859fa7380826cb9ad1f7
rtf-objdata-decoded RTF \objdata at offset 0x1880 175675 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.98, consistent with packed or encrypted content.