RTF / .DOC malware analysis — malicious · e0700b3492c8c379

MALICIOUS

RTF / .DOC

344.9 KB

MD5: bde3dfcc719485da3ad29da975571411 SHA-1: cdfa3f26b7fab16fb0c29db6ee363605400995e1 SHA-256: e0700b3492c8c379e1f0e6133b7a96f04c80a7887cd4f18288ac2bada5216cf6

140 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File

The RTF document contains multiple OLE objects, with specific heuristics indicating the use of \objdata and \objupdate, strongly suggesting an attempt to exploit OLE object activation. The presence of embedded OLE objects, particularly the composite moniker, points towards a malicious payload delivery mechanism. While no scripts were directly extracted, the RTF structure and heuristics indicate the file is designed to trigger the execution of embedded malicious code upon opening, likely leading to further stages of infection.

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
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_off000007ce.bin` `1516c8ccd8a5e035a321a988db9f026c854310fc4fbe414bd957be4bdb7ca23b`	rtf-objdata-decoded	RTF \objdata at offset 0x7CE	78433 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).
`objdata_01_off000285af.bin` `ad7bf1923f855fca5949d0c557a2a819b106cd84b204870bcc59064eb0c6e331`	rtf-objdata-decoded	RTF \objdata at offset 0x285AF	2632 bytes
`objdata_02_off00029b52.bin` `44deae4627fee3c44f54d5bd10477ec2e17f4c08135f08e2417832e36d10d037`	rtf-objdata-decoded	RTF \objdata at offset 0x29B52	12297 bytes

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