Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 4438a7f50a51b952…

MALICIOUS

RTF / .DOC

10.6 KB First seen: 2022-06-24
MD5: fb5b66fe85c5636aebc638dd5c56b852 SHA-1: 2bec23926afe0d00e78f64f3605ecb16b8d6ce7e SHA-256: 4438a7f50a51b952aa064afd7d2f97f8ab59a3d94b2effa064a8ee6d92282ada
60 Risk Score

Malware Insights

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

The RTF document contains embedded OLE object data, indicated by the RTF_OBJDATA heuristic. The RTF_OBJUPDATE heuristic suggests that this object is designed to be activated automatically, which is a common technique for exploiting vulnerabilities in applications like Microsoft Office. The embedded OLE object data itself, objdata_00_off0000170a.bin, is the primary artifact of interest. While no scripts were extracted, the presence of OLE object data strongly implies an attempt to leverage an exploit or deliver a malicious payload upon opening.

Heuristics 2

  • \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

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off0000170a.bin
30e0d72c519900a4efb1e70d154ebcc34ecf202651a4cbc37d07b1546c3bf475
rtf-objdata-decoded RTF \objdata at offset 0x170A 1489 bytes