Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 5278046daacc4237…

MALICIOUS

RTF / .DOC

228.0 KB
MD5: 4f8313415a181979db96b6c4c1ed20e2 SHA-1: edf5a68aafde8c3f61fdbedd997adc38f2ddbd25 SHA-256: 5278046daacc4237354be9a2b1094f6a9467e317b17c959c772ed5a86e25d737
62 Risk Score

Malware Insights

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

The RTF document contains embedded OLE object data and uses \objupdate to force OLE activation, indicating an attempt to exploit a vulnerability. A suspicious artifact, objdata_00_off00000060.bin, was extracted. The document body contains only a numerical string, providing no further context for the attack's lure.

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_off00000060.bin
81d1cacf54b2fe8403816e3a866ed8bc02457d215577b7df7f22353d211f5b78
rtf-objdata-decoded RTF \objdata at offset 0x60 116608 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact entropy is 8.00, consistent with packed or encrypted content.