Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 a326a50fc6c1bdf2…

MALICIOUS

RTF / .DOC

8.8 KB First seen: 2022-06-15
MD5: 440394706c0bb261eed2f757f64f89d8 SHA-1: 17ddc7cff43a525253b86f306e3c5b75f71d841b SHA-256: a326a50fc6c1bdf2bde0a7801716fa89de2e234b1e1ea0524db4194ab48bc78e
60 Risk Score

Malware Insights

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

The sample is an RTF document that contains OLE object data and triggers an \objupdate event, indicating an attempt to exploit a vulnerability. The high-severity RTF_OBJUPDATE heuristic suggests that the document is designed to activate embedded objects, likely to execute malicious code. The presence of OLE object data further supports this. Without a document body or script content, the exact payload and delivery mechanism remain unclear, but the core attack pattern involves exploiting RTF parsing to achieve code execution.

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_off0000111a.bin
354c173574775abfa04eb1f58d0f9476d9445aed8cdf31c6434e90fbbcd7f4b5
rtf-objdata-decoded RTF \objdata at offset 0x111A 1624 bytes