PDF malware analysis — malicious · 572edf98ddb594c9

MALICIOUS

PDF

15.7 KB

MD5: f655d52a87a3bf73f27d8e0fffa0a3c3 SHA-1: 902a134a6490c7c7fc3397e1ac27d3956d5e2e29 SHA-256: 572edf98ddb594c99f690a2eccda445db520399fb66a585a8e98bc2e1b97c975

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF sample was flagged as malicious by ClamAV (Pdf.Exploit.Agent-36086) and ML classifiers. High-severity heuristics indicate the presence of JavaScript with eval() calls and a large comment-padded stager, suggesting an attempt to obfuscate and execute malicious code. The embedded JavaScript stream, identified as 'javascript_obj0006_000.js', is likely responsible for exploiting a PDF vulnerability to download and execute a secondary payload. The ML classifier's confidence of 0.999995 further supports the malicious nature of this file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `1e687938371eeee84c9ee2a0156a6e239893a007b0fd700b0313c8cfb58724fc`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	425666 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).

Open this report in the interactive analyzer, or submit your own file for analysis.