Office (OLE) malware analysis — malicious · 7016ddb866f0ab3c

MALICIOUS

Office (OLE)

750.0 KB Created: 2014-12-02 00:30:00 Authoring application: Microsoft Office Word First seen: 2018-06-21

MD5: a08b44d7f569c36e33cd9042ba7e5b42 SHA-1: aedd69400b66b7d8b0b68869018cc578885d64f7 SHA-256: 7016ddb866f0ab3c039c78f35aaff9e3e3147029e481aa9b95997a142d1439fc

384 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The sample is a Microsoft Word document that exploits CVE-2007-3899, a memory corruption vulnerability. It contains an embedded PE executable, identified as 'embedded_office_00004e6f.exe', which is likely the payload. The presence of ShellExecute, VirtualAlloc, VirtualProtect, LoadLibrary, and GetProcAddress API calls further indicates malicious activity related to payload execution. The document's content, a resume, is likely a lure for spearphishing.

Heuristics 11

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.
Embedded PE executable critical OLE_EMBEDDED_EXE

MZ/PE header found inside document — possible embedded executable
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 ShellExecute API high SC_STR_SHELLEXEC

Reference to ShellExecute API
Reference to LoadLibrary API high SC_STR_LOADLIBRARY

Reference to LoadLibrary API
Reference to GetProcAddress API high SC_STR_GETPROCADDRESS

Reference to GetProcAddress API
Reference to VirtualAlloc API medium SC_STR_VIRTUALALLOC

Reference to VirtualAlloc API
Reference to VirtualProtect API medium SC_STR_VIRTUALPROTECT

Reference to VirtualProtect API
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.
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/officeDocument/2006/bibliography In document text (OLE body)
- http://schemas.openxmlformats.org/officeDocument/2006/customXmlIn document text (OLE body)
- http://schemas.openxmlformats.org/drawingml/2006/mainIn document text (OLE body)

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_office_00004e6f.exe`	embedded-pe	Office MZ+PE at offset 0x4E6F	747921 bytes
SHA-256: `8cb261b3d0de7342e9aca9f7604fe7433238080bba86a44aba75183271982cff`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.90, consistent with packed or encrypted content.
`ole10native_00.bin`	ole-package	OLE Ole10Native stream: ObjectPool/_1484472520/Ole10Native	735535 bytes
SHA-256: `182583e0c89d6535b6bce105ce9f20d51f25754febe18392ba3bc9b7b4f6efa0`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.90, consistent with packed or encrypted content.

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