Malicious RTF / .DOC — malware analysis report

Static analysis result for SHA-256 3a9961500c4dbb5d…

MALICIOUS

RTF / .DOC

283.4 KB First seen: 2022-02-24
MD5: ce5aa39e6b4bb8369514521fed12ff44 SHA-1: c792b9c454bc9275d017082504036e890d52fe5e SHA-256: 3a9961500c4dbb5da0bbb98f09741f34e10903ed48dee6d8df15178158afe9e5
140 Risk Score

Malware Insights

MITRE ATT&CK
T1204 Malicious Link T1204.002 Malicious Link: Malicious File

The RTF document contains multiple OLE objects and uses an 'enable editing' lure to trick the user into activating embedded content. This is a common delivery mechanism for malware droppers. No scripts were extracted from this sample, and the document body text is minimal, providing limited insight into the specific payload.

Heuristics 5

  • Composite Moniker in RTF OLE object high CVE related RTF_COMPOSITE_MONIKER_RELATED
    RTF contains Composite Moniker CLSID in OLE object context, but no nearby scriptlet/SCT payload was confirmed. Treat as related moniker attack-surface evidence rather than proof of CVE-2017-8570 exploitation.
  • \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 3 \objdata section(s) — embedded OLE objects
  • Embedded OLE object medium RTF_OBJEMB
    RTF contains \objemb — embedded OLE object
  • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objdata_00_off00000ba2.bin
fb1801225432b9b06ab76d9d6e01a806eb885e10e1f8cb2a97883b1dfd9ee10a
rtf-objdata-decoded RTF \objdata at offset 0xBA2 47648 bytes
objdata_01_off00018f64.bin
893d8db8585190a273d0c7c3dcff2eb58184b866a3687a9319ca72a8284876cb
rtf-objdata-decoded RTF \objdata at offset 0x18F64 2632 bytes
objdata_02_off0001a507.bin
44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037
rtf-objdata-decoded RTF \objdata at offset 0x1A507 12297 bytes