PDF malware analysis — malicious · cc31e6f586178e0d

MALICIOUS

PDF

289.4 KB

MD5: 58fd96b0c297177083c2910b0995c9b0 SHA-1: aae0ff961b516215c0ccd9037b098b5ca2d69a3b SHA-256: cc31e6f586178e0ddc785449e69979e82408f11ed57a40a0c98e50c1a32c7e3c

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains a launch action and an embedded script payload, flagged by heuristics as suspicious and potentially malicious. The embedded script, when analyzed, appears to be a PowerShell script that constructs a file path and attempts to write to it, likely to stage a downloaded payload. The script's construction of the file path using `cmd.exe /C echo Set o=CreateObject^("Scripting.FileSystemObject"^) ...` suggests an attempt to obfuscate its actions. The primary intent is to download and execute a secondary stage.

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_000482d7.bin` `6e8a600804edb82794b9258372b55ca4af54a8ab96f9a161d4f9ef2e9222fb86`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482D7	296228 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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