Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 71633f7ae381ec70…

MALICIOUS

RTF / .DOC

5.7 KB First seen: 2022-09-06
MD5: 9769025a436d9df78779e14837fb2fb9 SHA-1: 31baa0238b3c7c2c9ec4c13d7c8a362214436d04 SHA-256: 71633f7ae381ec7052e3212442eee052d0372cfe4885d1577b3cb38f42b60996
80 Risk Score

Malware Insights

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

The RTF document contains OLE object data and an instruction to enable editing, which are strong indicators of a macro-based lure. The heuristic 'SE_ENABLE_LURE' specifically flags the document's attempt to trick the user into enabling macros or editing to bypass security settings. This suggests the file is designed to download and execute a secondary payload.

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_off000006f0.bin
adcc15948567fffb78041d2af2248c8d98bc1674b1cfa4b37bf7be246bafa910
rtf-objdata-decoded RTF \objdata at offset 0x6F0 1416 bytes