PDF malware analysis — malicious · ba1e2e72114d5cb5

MALICIOUS

PDF

2.2 KB

MD5: 486880236806cfc63cdf7993cd33f0fb SHA-1: b93e3d3ad50d81e4bb1f46a161f721c6961c8698 SHA-256: ba1e2e72114d5cb5cb9a19d5333564c17f40a10c3fa6ce1c0082157b95fe6a4f

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript

The file is a PDF containing obfuscated JavaScript, indicated by multiple PDF-specific heuristics including `PDF_JAVASCRIPT`, `PDF_JS`, `PDF_EVAL`, and `PDF_UNESCAPE`. The `ClamAV_DETECTION` heuristic identified it as `Pdf.Exploit.Agent-36082`. The embedded JavaScript likely attempts to exploit a PDF vulnerability to download and execute a second-stage payload. The obfuscation techniques used in the script suggest a malicious intent to evade detection.

Heuristics 7

ClamAV: Pdf.Exploit.Agent-36082 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36082
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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_obj111611_000.js` `772da696bdb365f3f1eb4ea6af881baad391be62f3591b19f2f9827fcc4c9b53`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x7E0	479 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `84c5947487a39c371397be7402d86e1237fc291d0ac6b116a0736eb2a305cfbe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2834 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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