PDF malware analysis — malicious · fed2c093035edb0f

MALICIOUS

PDF

118.5 KB

MD5: e9f5c0665957b7c3d2965d819d9b0835 SHA-1: 4e187ec9159065cbfa29e1f9145bc3024df83c68 SHA-256: fed2c093035edb0f7ea81f74acf5abec75c15b77e5d2e784065d75e841878ebc

196 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains obfuscated JavaScript, including calls to eval() and String.fromCharCode, which are commonly used to hide malicious code. Heuristics indicate a large comment-padded JavaScript eval stager and ML classification strongly suggests maliciousness. ClamAV detection confirms this, identifying it as Pdf.Exploit.Agent-36086. The primary attack pattern involves exploiting PDF vulnerabilities to execute arbitrary code, likely for downloading further malware.

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` `b8a0c90cc30ce8c496d48915b4ef0ecd668aeffcdc1ff283304997948062b42f`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626968 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.