PDF malware analysis — malicious · 49174945d1a219a2

MALICIOUS

PDF

118.5 KB

MD5: 824fef31e07bc28393deb9a517076c52 SHA-1: 2136b03a84656e50b16b01bd9e047f77b13dd993 SHA-256: 49174945d1a219a2c283177698341178867f21964a7be291510b4d52aee4c176

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious JavaScript

The PDF contains embedded JavaScript, including a large comment-padded eval stager, indicating an attempt to obfuscate and execute malicious code. The 'eval()' call and 'String.fromCharCode' usage are strong indicators of code execution. ClamAV detection as 'Pdf.Exploit.Agent-36086' further confirms its malicious nature. The primary function appears to be the execution of this JavaScript, which likely downloads and executes a secondary payload.

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` `1e0e4c3c01c3b27a8352cc83c10cdc3f1045d9126c66acb68bf2bb13f4a91737`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627059 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.