PDF malware analysis — malicious · d731b03009d76861

MALICIOUS

PDF

289.5 KB

MD5: 4645aaf0db8e36b9134321f62d2bfda0 SHA-1: 58e130b82877f6cfd6c336bab82c711401ca76b6 SHA-256: d731b03009d76861d7f0b61fb77d55bbbd187c1950cb871ebd7426fac80e4242

180 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.003 Windows Command Shell

The PDF contains a launch action that triggers an embedded script. This script is identified as a suspicious artifact with hex escape obfuscation and script execution terms. The script likely attempts to download and execute a second-stage payload, as indicated by the command line fragment 'cmd.exe /C echo Set o=CreateObject^("Scripting.FileSystemObject"...'. The presence of a launch action and embedded script strongly suggests a malicious intent to execute arbitrary code.

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
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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_00048325.bin` `2540c4b763de60077f0a343d8cf3a99140d5e97ce5e5f23f406b87b818206787`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x48325	296306 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 shell/COM execution token(s). Carved artifact contains 1 long hex-escaped blob(s).

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