Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 f9c97f3a39ae2a47…

MALICIOUS

RTF / .DOC

17.7 KB First seen: 2022-08-19
MD5: 92168b23982fa7a100c1e102e97c467b SHA-1: 2e23e0097378caa7591674dccdd6d8f3f5a00f08 SHA-256: f9c97f3a39ae2a47238fe4fc52501a7d30a93e7dde6df7cedcfc2b2042740aa5
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 an instruction to update the OLE object, indicating an attempt to execute embedded content. The document body explicitly instructs the user to 'enable editing to open in readable format', which is a lure to bypass macro security settings and execute malicious code. This suggests the file is a dropper designed to download and execute a second-stage 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_off00001340.bin
9e9857adf2ec698354f4cedcf0aa0383d65c55d06b0b19b6b8157a6d4c0fceb5
rtf-objdata-decoded RTF \objdata at offset 0x1340 4257 bytes