RTF / .DOC malware analysis — malicious · f1a5d8f1809aee7b

MALICIOUS

RTF / .DOC

2.23 MB

MD5: e1db12c59e0136d56abace7d0e2b5c76 SHA-1: f22597ea91adaf1d3ef77576723360d7b1e899be SHA-256: f1a5d8f1809aee7bcbcb8ce43588b0269b77a3e87fb648881ea1b67cdb8c5d83

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious File T1059.003 Windows Command Shell

The RTF file contains an embedded OLE object that leverages a known Equation Editor vulnerability (CVE-2017-11882). The heuristic firings indicate that this object contains decoded payload data and triggers an objupdate event, strongly suggesting it's designed to execute arbitrary code. The large amount of hex-encoded data within the object further supports the presence of a hidden payload. The extracted artifact 'objdata_00_off00000041.bin' is likely the decoded executable.

Heuristics 5

Decoded Equation Editor payload + PE critical RTF_EQUATION_EDITOR

RTF decodes to an Equation Editor ProgID adjacent to OLE activation and the same decoded object stream contains embedded PE bytes. This matches the Equation Editor exploit surface used by CVE-2017-11882 / CVE-2018-0802 documents, while requiring payload evidence to avoid flagging benign Equation references.
\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.
Large hex data blocks in OLE object high RTF_EXCESSIVE_HEX

RTF contains ~2336KB of hex-encoded data inside \objdata sections — may hide a payload
OLE object data medium RTF_OBJDATA

RTF contains 1 \objdata section(s) — embedded OLE objects
Suspicious extracted artifact info 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`objdata_00_off00000041.bin` `a8582de945ceec16baa15f407efaadf40c5a1f9cbcac675d6325136b2abb028e`	rtf-objdata-decoded	RTF \objdata at offset 0x41	1168421 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.99, consistent with packed or encrypted content.

Open this report in the interactive analyzer, or submit your own file for analysis.