PDF malware analysis — malicious · 96e91301b83b77aa

MALICIOUS

PDF

3.9 KB

MD5: e0334d97277f086277b351824ffd22ea SHA-1: 6e4ebd4afa903b9a6bd5ca1b2b878d0a19f731ae SHA-256: 96e91301b83b77aad2333636d31a5675f7e659e3082b9c2e546aa50753f3716f

124 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains obfuscated JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics, and the ML classifier's high confidence score. The embedded JavaScript file, 'javascript_obj0002_000.js', is likely responsible for executing the malicious payload. ClamAV also flagged the file for obfuscated objects, further supporting the malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 6

ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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)
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed 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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0002_000.js` `96c3915a0c09b1f4416d559e4f18a512817f8123cb4d950c7d07a56d19d6c17a`	pdf-javascript-stream	PDF /JS object 2 at offset 0x5C	9278 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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