Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 aa487294bdc1c2f9…

MALICIOUS

RTF / .DOC

308.0 KB
MD5: 9d1cd067635373f801b7e51126986e73 SHA-1: 74fe72ed5c810b64f867191c33648c31622fba68 SHA-256: aa487294bdc1c2f95e339fabab996890e64e73e14e629c511d69544463c13d59
129 Risk Score

Malware Insights

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

The RTF file contains OLE object data and an \objupdate directive, indicating it's designed to activate embedded objects. This strongly suggests a malicious intent to exploit OLE vulnerabilities or deliver a payload. While no specific family is identifiable, the technique points towards a downloader or exploit delivery mechanism. The extracted objdata artifact is flagged as suspicious and is the primary IOC.

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_off00001121.bin
0ee7ee6076bf5907611b57e6909b72a1c04bcfe791ec075b51b78592b14d2e13
rtf-objdata-decoded RTF \objdata at offset 0x1121 103498 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 7.96, consistent with packed or encrypted content.