PDF malware analysis — malicious · 4aac4d561688d960

MALICIOUS

PDF

118.6 KB

MD5: 84ed8d9c76b6225d3a9dc4233f6b4d2a SHA-1: d36bfc88157c129eb289583d459dc0e07c4ee61c SHA-256: 4aac4d561688d960a26daf3ffcbab026f37d634717fdeeaa050178613e70955e

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF document contains embedded JavaScript, which is triggered by a PDF_JAVASCRIPT heuristic. The JavaScript stream includes an eval() call and a large comment-padded eval stager, indicating it's designed to execute arbitrary code. ClamAV detection confirms this as Pdf.Exploit.Agent-36086, suggesting it's a known exploit. The primary attack vector is the exploitation of a JavaScript vulnerability within the PDF.

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` `ffaf39621edc627af457e33a1f7058c3347345a38d834d8212a2196a1e6681e1`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626670 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.