Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 ec51a2230da85045…

MALICIOUS

RTF / .DOC

149.0 KB First seen: 2022-10-19
MD5: 720e2ffb2ebb735d8c5c795b2871b66f SHA-1: dfeca9475770f112feea406e4533152ac57d1df8 SHA-256: ec51a2230da850458148c3ac1cd2e5e1eb8a207b4c5b7a6e7bcd6f670b91fbe9
80 Risk Score

Malware Insights

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

The RTF document contains OLE object data and uses an \objupdate directive, indicating an attempt to activate embedded objects. The document body explicitly instructs the user to "Enable editing" and implies macro execution is necessary, which is a common social engineering tactic to bypass security measures and deliver malicious payloads. No specific malware family could be identified.

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_off00001637.bin
8edc243f9a262003111140bce3e054f14bbabbe29681cb3dfe792fdd052fde6d
rtf-objdata-decoded RTF \objdata at offset 0x1637 1502 bytes