Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 cf95083829585c43…

MALICIOUS

RTF / .DOC

189.1 KB First seen: 2022-10-12
MD5: 357a7a3b587cb6b545e69e2552ad498b SHA-1: 09ce13976bbe66d42b8fca40a94da2d92135638a SHA-256: cf95083829585c43674a51ca6c9eafd051b8daa206e8cf9875d5c3ff2d241653
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 file is an RTF document containing an embedded OLE object, which is a known technique for delivering malicious content. The document body explicitly instructs the user to 'Enable editing' and implies the need to enable macros, a common social engineering tactic to bypass security measures and execute embedded payloads. The presence of OLE object data and the explicit lure strongly suggest a malware delivery attempt.

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_off00000fe3.bin
9bd56a6c1051b39bc4d7f959334f8cfb961b74bd7f4040c4a7b34d0efed3eba9
rtf-objdata-decoded RTF \objdata at offset 0xFE3 1587 bytes