Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 73567ae90c7f723a…

MALICIOUS

RTF / .DOC

97.3 KB
MD5: 6b91deaea8cda194db867ad18454bc11 SHA-1: e8a6bb2540c08a6342784af96aa5bb85d3da15a7 SHA-256: 73567ae90c7f723ab21de0de86e70ed248922372b37efa938e634c368f7b0746
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The RTF document contains an embedded OLE object with an objdata section and an objupdate directive, indicating an attempt to exploit a vulnerability. The high entropy of the decoded OLE object suggests it contains executable code. While no specific script was extracted, the presence of OLE object exploitation strongly suggests a pattern of delivering a secondary payload, often via a command interpreter or downloaded executable.

Heuristics 3

  • Ole10Native stream in RTF OLE object high CVE related RTF_OLE10NATIVE_STREAM
    RTF contains an embedded OLE object with an Ole10Native stream. This is a strong payload-container signal and is related to Word/OLE exploit delivery, but it is not specific enough on its own to assign a CVE.
  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000146a.bin
205349366aaf45bea6239d1a29fd0921b905fb884fa006145db831dfb19b8320
rtf-objdata-decoded RTF \objdata at offset 0x146A 4783 bytes