PDF malware analysis — malicious · a6a7e0969ea828d8

MALICIOUS

PDF

118.7 KB

MD5: db150a1946cc1a1bf9e8120116b2baa2 SHA-1: 49a3877b21e901ba3a920599f3ffa95c8f855351 SHA-256: a6a7e0969ea828d8f9d08e03b7d06d903f29f86bbc799eab9bfb116a5cd7be73

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file was flagged as malicious by multiple heuristics, including a high-severity 'PDF_EVAL' and a 'PDF_JS_LARGE_COMMENT_PADDED_EVAL' rule, indicating the presence of obfuscated JavaScript designed to exploit vulnerabilities. The ML classifier and ClamAV detection further confirm its malicious nature, identifying it as 'Pdf.Exploit.Agent-36086'. The embedded JavaScript likely attempts to download and execute a second-stage payload.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `9404bc70565b4ac1a657b4b6ab704fc5cea7a1cc486bc15ca45d33d0d1fac029`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627873 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).
`stream_002_off0001d8e2.bin` `eb65c74b07f54b82a22340138011ebdb1c88902fda6fac07781e90bd4ae5c6f2`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D8E2	200 bytes

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