Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 dff0e47bd498a9ca…

MALICIOUS

RTF / .DOC

66.0 KB First seen: 2023-02-20
MD5: 3653f2a5db35870295ad408a2afea998 SHA-1: 3323cbdc1f3b902a82807e27ae2262cfaa558c07 SHA-256: dff0e47bd498a9cae3b84239b9cdb1cd7507bb9049d769fa099d7bcde19f6e01
80 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File T1566 Phishing T1566.001 Phishing: Spearphishing Attachment T1566.002 Phishing: Spearphishing via Service

The RTF document contains an OLE object and uses an ".objupdate" directive, indicating it's designed to activate embedded content. The document body explicitly instructs the user to "Enable Editing" and "Enable Content", a common social engineering tactic to bypass security measures and execute malicious macros or embedded objects. This strongly suggests a downloader or dropper functionality.

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
  • Macro/content-enable lure medium SE_ENABLE_LURE
    Document instructs the user to enable macros or editing — a common technique used by malware droppers to bypass Office macro security settings

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off000007a3.bin
90bc16160f803facd33f2cab6491529c8aed02400f7c67569eacb666338ebfea
rtf-objdata-decoded RTF \objdata at offset 0x7A3 3129 bytes