Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 908fc536f3b4fb3f…

MALICIOUS

RTF / .DOC

6.9 KB First seen: 2022-08-31
MD5: 391d1a5b26a6e4fba0d239c773697fd7 SHA-1: 090275a3f52b8d030282504aa37789462ee83a35 SHA-256: 908fc536f3b4fb3f49088cabe1b860c042647d49b30a4a4a6b72fe3275ef7be0
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 OLE object data and uses an \objupdate directive, indicating it's designed to activate embedded objects. The presence of a lure message "please click enable editing to view in readable format" strongly suggests a macro-based delivery mechanism. While no scripts were explicitly extracted, the heuristics point towards a malicious RTF file likely attempting to download and execute a secondary payload upon user interaction.

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
  • 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_off000007b4.bin
506e9aa0899bea334e89ffc40ef6935ad56f75e9e3b5515cac6577a14f6f551a
rtf-objdata-decoded RTF \objdata at offset 0x7B4 1839 bytes