PDF malware analysis — malicious · dfeae7346efd3359

MALICIOUS

PDF

118.6 KB

MD5: d359595390257481472b7fdc4aee9efb SHA-1: f456cb4f5d0fe39d36b57717b668d42705372983 SHA-256: dfeae7346efd3359b9085016c8a48b65d17b568b229c74bc2c80c5eff1470ac7

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains embedded JavaScript, including a high-severity heuristic for eval() calls and a large comment-padded JavaScript eval stager. ClamAV also detected this file as 'Pdf.Exploit.Agent-36086'. These indicators suggest the JavaScript is designed to exploit vulnerabilities within the PDF reader to download and execute a secondary payload. The specific nature of the exploit and payload cannot be determined from the provided evidence.

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` `075e8c20c6cd814b82f11f6d04fff8e69ee3b5b76d341c67365ef53bdad640da`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	626938 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_001_off0001d6e6.bin` `da763895595039957149fc222ad737c11c1accc5750d6e479372eaf8041cf439`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x1D6E6	300 bytes

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