PDF malware analysis — malicious · f54705775667b8d2

MALICIOUS

PDF

226.4 KB

MD5: 55000d709cd81cc45c1f6f7a2e6e6ed4 SHA-1: 9ea904c0d2bd36334fe4977b57b36f96934b4913 SHA-256: f54705775667b8d29880e38c70e5a567efd80693cd2f64f010128c9b968ef0b4

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The critical ClamAV detection of 'Pdf.Exploit.Agent-36086' strongly suggests this is a known exploit. The embedded JavaScript, particularly the use of eval() and String.fromCharCode, is characteristic of obfuscated malicious code designed to download and execute further stages. The extracted artifact 'javascript_obj0006_000.js' likely contains the core malicious logic.

Heuristics 6

ClamAV: Pdf.Exploit.Agent-36086 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36086
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
JavaScript action low PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
Suspicious extracted artifact info 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
`javascript_obj0006_000.js` `0c20470b2dd288439afef212d9c9818424e5e74ee196974e4687547ba3472e74`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	322731 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 10 long base64-like blob(s).

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