PDF malware analysis — malicious · aba8164b0edc768c

MALICIOUS

PDF

289.4 KB

MD5: 5a5d11761cadba09e99f712c5aa73632 SHA-1: 589c926be12914ff7cb501be53975e5ba7677768 SHA-256: aba8164b0edc768cf3470b068652b03069ee7a91f3b6589fe7f97965a865fa9f

210 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains a launch action and an embedded script payload, indicating an attempt to exploit vulnerabilities. The embedded script uses cmd.exe to construct a command that appears to download and execute a second-stage payload from a specified path. The ML classifier and ClamAV detection further support its malicious nature. The script's construction suggests it is designed to download and execute a payload, likely leading to further compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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_000482e6.bin` `5a4a989e032105cbb1ae33878deb611c86eae155549f85a892c2b448fcf8891e`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482E6	296243 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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