Office (OLE) malware analysis — malicious · 5ae66e5123850102

MALICIOUS

Office (OLE)

77.5 KB Created: 2019-06-20 14:07:00 Authoring application: Microsoft Office Word First seen: 2019-11-20

MD5: ada810ff00e0f7868ab7b5c6a89ff905 SHA-1: f730f62b3d430a7e0ffdf2d3311b7473eeb01b96 SHA-256: 5ae66e5123850102bd7bf5e2c174d31e02e1f6e20f784f7370af8c03f80fe9df

222 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The file is a malicious Microsoft Office document that exploits CVE-2007-3899, a memory corruption vulnerability. It contains an embedded OLE object (ole10native_00.bin) which is likely an executable payload. The presence of WinExec and VirtualAlloc API calls further suggests the execution of malicious code. The document body appears to be legitimate financial or legal text, indicating a potential lure.

Heuristics 6

CVE-2007-3899 — Microsoft Word malformed string memory corruption critical CVE likely CVE_2007_3899

Word OLE document has the MS07-060 malformed-string exploit shape: a Word 97-family FIB points to a malformed DOP/string-table region with an abnormal INT_MAX run, inflated text counters, and exploit payload or Mdropper.Z campaign evidence.
OLE with Ole10Native — possible CVE-2026-21514 exploitation high CVE likely CVE_2026_21514

Document contains a Word OLE object with Ole10Native plus executable, PE, or risky remote-link indicators. CVE-2026-21514 exploits OLE metadata validation; this stronger structure is treated as likely exploitation.
Ole10Native package drops an auto-executable payload critical OFFICE_PACKAGE_RISKY_FILE

OLE Package displayName or fullPath ends in a directly auto-executable extension (a runnable binary or a script the default shell host runs on double-click). Embedding such a payload inside an Office document has no benign authoring use — it is a malware-delivery dropper.
Reference to WinExec API high SC_STR_WINEXEC

Reference to WinExec API
Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC

Reference to VirtualAlloc API
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.

URL http://schemas.openxmlformats.org/drawingml/2006/main In document text (OLE body)

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`ole10native_00.bin`	ole-package	OLE Ole10Native stream: ObjectPool/_985680344/Ole10Native	41580 bytes
SHA-256: `e52f8c8f803d7120039edd2ff19b15947442caf9aceb4fe7dace223c8ffccea9`

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