PDF malware analysis — malicious · 362c60f7c5c8396d

MALICIOUS

PDF

118.6 KB

MD5: 394aa5625eb3407aa3a05cf59b14ea18 SHA-1: a4a1c839c7030b24218e5e202da306d3d46cc6b0 SHA-256: 362c60f7c5c8396d48d5f2294f55badffcfc4d406666d6d75d96f2317bbc275a

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, including a heavily obfuscated 'eval' stager. This script is designed to decode and execute arbitrary code, a common technique for delivering second-stage malware or exploiting vulnerabilities. The ClamAV detection 'Pdf.Exploit.Agent-36086' further confirms its malicious nature. The presence of 'eval()' and 'String.fromCharCode' within the JavaScript stream indicates dynamic code execution.

Heuristics 7

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)
Large comment-padded JavaScript eval stager high PDF_JS_LARGE_COMMENT_PADDED_EVAL

PDF JavaScript contains a very large stream padded with long random-looking block comments around String.fromCharCode and eval. This is an exploit-kit obfuscation shape used to bury a decoder and recovered stage inside noise, not normal PDF form automation.
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` `390a9b7a869c9c2670f91a7d870f61630378549c89d6d07aa3121404bc15ab98`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627414 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 42 long base64-like blob(s).

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