PDF malware analysis — malicious · 89493ac0d4779c1d

MALICIOUS

PDF

2.7 KB

MD5: fd26b54ff1eec86be2b9e06d2cdb4577 SHA-1: c597e669c6db34c8b4029fdb0b1c7abe5d57261a SHA-256: 89493ac0d4779c1daeea6620c380ec5e2b095ac57be2fb205aa09a99ec8185e5

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly indicates maliciousness. The JavaScript streams, particularly javascript_obj111712_001.js, likely contain obfuscated code that uses eval() and String.fromCharCode to execute arbitrary commands, a common technique for downloading and running further malicious payloads. The exact URL or payload is not directly extractable due to obfuscation, but the pattern suggests a downloader.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
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_obj111711_000.js` `793552d1f1e15b2759c2c6efa87b55a4249d6e1e140725f0553dfdc8dd442220`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	2562 bytes
`javascript_obj111712_001.js` `e1bebb0048c81010da8ab96bde724709511d3e051e6100ca08ab513f7a3856a3`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x8B4	526 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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