Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 df1b7c4d03a66248…

MALICIOUS

RTF / .DOC

6.3 KB First seen: 2022-09-05
MD5: a88055dc809a146df622813d771ec49e SHA-1: 0b2b37ff12367c5cfb21fd96e3b593337d0351fc SHA-256: df1b7c4d03a6624829226568a23aba15e6fe2b250689ce3a51728064e6fd87be
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 that contains OLE object data and uses an \objupdate directive to force OLE activation. The document body explicitly instructs the user to click 'Enable editing', a common social engineering tactic to bypass macro security settings and execute malicious content. This suggests the file is a downloader or dropper for further malicious payloads.

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_off00000699.bin
7a297eb5f11352a281836018cf57fd0d22cc1ede0fabe4baf4bfacd2d12643ab
rtf-objdata-decoded RTF \objdata at offset 0x699 1665 bytes