PDF malware analysis — malicious · 0540f4d95c771504

MALICIOUS

PDF

2.4 KB

MD5: 097014db089f1bb60f3e7a54200011b3 SHA-1: 362d110cdb7f1dc436950e23f6b0e64d65f3de37 SHA-256: 0540f4d95c7715042ac05e85abba52a22e4fcb5be9464c4bf7b4bc180ec8bfbc

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript that is heavily obfuscated and utilizes eval() calls, indicating an attempt to hide malicious code. The deobfuscated JavaScript reveals functions designed to download and execute a secondary payload. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to the Pdf.Dropper.Agent-7224119-0 family.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Dropper.Agent-7224119-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7224119-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (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.
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_obj0009_000.js` `3d9ed8880fe55ffe3c6a4c5430068b8f7bca628645ccb40b7b776f3b0c92ffae`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	10432 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `a959a5df898f5f27ea8992a1027c3e76ba982b7bb2e9b9623f60a7a9a124a17f`	deobfuscated-js	split-join delimiter stripped JavaScript at offset 0x129	6947 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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