RTF / .DOC malware analysis — malicious · 3571cbbb01a0d3f3

MALICIOUS

RTF / .DOC

218.1 KB

MD5: 092408fa528759ea6f88c47d5577d3a1 SHA-1: 91f00be911e9a058fee1a723ae482050b2440b7a SHA-256: 3571cbbb01a0d3f39231ad8e32869b4d739fad87b2b9679f8e734011f979a70a

160 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.005 Visual Basic

The RTF document contains multiple embedded OLE objects, with specific heuristics indicating the use of `objdata` and `objupdate` directives. This strongly suggests an attempt to exploit OLE object handling to execute arbitrary code. The document body explicitly prompts the user to 'Enable Editing', a common lure for macro-based or embedded object execution. No scripts were extracted, but the OLE object structure points to a downloader or exploit delivery mechanism.

Heuristics 6

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
Suspicious extracted artifact medium EXTRACTED_FILE_STATIC_TRIAGE

One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000ba2.bin` `566c0a486e4e970f6bf6b4e4a1c6291c00480459e4c12296e616f05ac70004af`	rtf-objdata-decoded	RTF \objdata at offset 0xBA2	15544 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off00008a8a.bin` `893d8db8585190a273d0c7c3dcff2eb58184b866a3687a9319ca72a8284876cb`	rtf-objdata-decoded	RTF \objdata at offset 0x8A8A	2632 bytes
`objdata_02_off0000a02d.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0xA02D	12297 bytes

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