Office (OLE) malware analysis — malicious · a1ad94f243ee6858

MALICIOUS

Office (OLE)

398.0 KB Created: 2017-09-13 21:56:00 Authoring application: Microsoft Office Word First seen: 2017-10-10

MD5: 99d2a011f15cdd11eb87231043012aa4 SHA-1: e2019a63a3bcdb1d78c91daf7477f77211e635c0 SHA-256: a1ad94f243ee68580251853e00d7b82973109d37a595d0f0cc648ceab09417f2

502 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample is a Microsoft Word document that exploits CVE-2007-3899 to execute arbitrary code. It contains an embedded PE executable, identified as Win.Exploit.Bypassuac-9883294-0 by ClamAV. The document body suggests the user double-click the file to convert it, which is a lure to execute the embedded malicious executable.

Heuristics 10

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.
ClamAV: Win.Exploit.Bypassuac-9883294-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Exploit.Bypassuac-9883294-0
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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_office_00003ab5.exe`	embedded-pe	Office MZ+PE at offset 0x3AB5	392523 bytes
SHA-256: `ff61a3f4d0866a16da629500cf47556baf90c44eec9e333432e4f5bf5962cf68`
Detection ClamAV: Win.Exploit.Bypassuac-9883294-0 Obfuscation or payload: likely Carved artifact entropy is 7.74, consistent with packed or encrypted content.
`ole10native_00.bin`	ole-package	OLE Ole10Native stream: ObjectPool/_1566848526/Ole10Native	388453 bytes
SHA-256: `4976297571f45956fbb0bcfd725801a9c5ea13b2360123d2975bf2fc6dbefb7c`
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.78, consistent with packed or encrypted content.

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