PDF malware analysis — malicious · 360919194eac9da5

MALICIOUS

PDF

118.7 KB

MD5: 5686e11aadeca9451c8e3eda4e99a23a SHA-1: 3c89e1b2cb39446d67be5aa53d8359e1d7c82b05 SHA-256: 360919194eac9da58703e3c8e995cfd1a51c1288b80e3e648ef25090e67b088d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF contains embedded JavaScript, including a large comment-padded stager that utilizes `eval()` and `String.fromCharCode()`. This indicates the script is designed to deobfuscate and execute further code. The ClamAV detection `Pdf.Exploit.Agent-36086` strongly suggests this is a known exploit delivery mechanism. The primary attack pattern involves leveraging JavaScript within the PDF to initiate a malicious chain of execution.

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` `2c04d8f814fafef2e53b6e4270f7714aaa35ccd8fbd4fb0d09b02941bd4271e8`	pdf-javascript-stream	PDF /JS object 6 at offset 0x143	627621 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).
`legacy_pdfkit_stage_000.js` `fe06e5a5beeabb984afd78468c5010e335c675b3743153b1f2ffe249440726d1`	deobfuscated-js	double percent-decoded annotation JavaScript at offset 0x143	262144 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 562 long base64-like blob(s).

Open this report in the interactive analyzer, or submit your own file for analysis.