PDF malware analysis — malicious · 2b73ca48df5f3300

MALICIOUS

PDF

289.4 KB

MD5: 04cdfb8408a35305cc4f89333dfc8346 SHA-1: 8e53646a02c555ee1401c2680128b4ce6bc4ee3e SHA-256: 2b73ca48df5f330023b973230e23944efa4b2cfc64933d64c370be830cb4fa57

210 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains an embedded script payload and a launch action, indicating it is designed to execute malicious code upon opening. The script appears to be obfuscated but likely involves downloading and executing a second-stage payload from a remote source, as suggested by the 'Script execution terms' heuristic. The presence of 'cmd.exe /C' in the extracted document body further supports the execution of commands.

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_000482e2.bin` `5cb4f23ae79d6ca0b401512bb6be1e3113f00ef882ae82196ad1de12c5a26288`	pdf-embedded-script	PDF decompressed stream script payload at offset 0x482E2	296239 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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