PDF malware analysis — malicious · b846fae5d50d21fb

MALICIOUS

PDF

244.6 KB

MD5: 3e860411e418b19b8b56d6c065bf4aca SHA-1: a1179d0d2d6bacb5a60e24d4d76dee3da0226d24 SHA-256: b846fae5d50d21fbd99ef4ebc25329932a989d8e0a21753fa920fab767b2354e

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell T1105 Ingress Tool Transfer

The PDF file contains an embedded script and a launch action that executes 'cmd.exe'. This indicates the document is designed to exploit a vulnerability to run arbitrary commands. The embedded script likely facilitates the download and execution of a secondary payload, a common technique for initial access and further system compromise. The specific exploit and payload are not identifiable from the provided static analysis.

Heuristics 4

Launch action critical PDF_LAUNCH

PDF contains a /Launch action whose target is an executable, URL, or UNC path — can start an external application
/Launch action target: cmd.exe critical PDF_LAUNCH_COMMAND

PDF /Launch action specifies an executable target with parameters '/c echo Set fso=CreateObject("Scripting.FileSystemObject"' — references a known-dangerous executable (cmd, PowerShell, etc.).
Embedded script payload in PDF stream high PDF_EMBEDDED_SCRIPT_PAYLOAD

PDF stream bytes contain script execution markers such as ActiveXObject/CreateObject, WScript.Shell, PowerShell, or shell-exec primitives. This is stronger than ordinary PDF JavaScript because it indicates a staged external script payload hidden in stream bytes.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`embedded_pdf_script_0003cd3f.bin` `23c4123f878b748561c14bd3bb38deaebfdb3d95ec98d3442b91f29d0947cf74`	pdf-embedded-script	PDF raw stream script payload at offset 0x3CD3F	248958 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 shell/COM execution token(s).

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