Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 1172aea8b8ffb199…

MALICIOUS

RTF / .DOC

351.6 KB
MD5: ecfb7054d878b47530bb8c6f857b0ac0 SHA-1: 2e090c905962e736ccbbe999d7e5bba34d65dbf5 SHA-256: 1172aea8b8ffb1998b61ecb5b1ec2fa7fc2c150a24f138ae2cc91ad8515e79fe
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF document contains embedded OLE objects, indicated by RTF_OBJDATA and RTF_OLE10NATIVE_STREAM heuristics. The RTF_OBJUPDATE heuristic suggests that these objects are designed to be activated, likely to execute embedded code or launch a secondary payload. The presence of a high-entropy carved artifact (objdata_00_off00001e01.bin) further supports the malicious nature of the embedded object, suggesting it contains obfuscated or packed code.

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 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_off00001e01.bin
e4fd26e22b7e54a170dab4c159afc0061c1b8568fa55691e4dd60cf9fde9a529
rtf-objdata-decoded RTF \objdata at offset 0x1E01 64061 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.93, consistent with packed or encrypted content.