PDF malware analysis — malicious · c205dec2f09b0d7a

MALICIOUS

PDF

291.8 KB

MD5: ec33cec98c80a3822373d1ce3ced8d5a SHA-1: dcb63608584d27d70d453b5e6e87eba28a3ea377 SHA-256: c205dec2f09b0d7a4a75523469580cf8ffb52229e37293b6767c1bf2d3d5efd1

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, flagged by multiple heuristics including ML classification. The JavaScript stream, named 'javascript_obj0008_000.js', is likely responsible for executing the malicious payload. The use of String.fromCharCode and ASCIIHexDecode filters suggests obfuscation techniques common in PDF-based malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0008_000.js` `ae605780b2b5051a9bf8666eae38ac75bf66c6159d3fe6784a0bc7e943cf1e9f`	pdf-javascript-stream	PDF /JS object 8 at offset 0x1CE	99336 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.