PDF malware analysis — malicious · a4b0893927cc6be9

MALICIOUS

PDF

8.2 KB

MD5: b1658b433ce797cafa42b468727c6777 SHA-1: a2f02d391e256b70513a7518b8fce26447bd4413 SHA-256: a4b0893927cc6be9dac0be64b360f16f3e0fc39ee38d3e3758782e0178062fd0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, flagged by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The presence of PDF_EVAL and PDF_FROMCHARCODE indicates that the script is obfuscated and likely attempts to execute arbitrary code. The ML classifier strongly flags this PDF as malicious. The extracted artifact 'javascript_obj0013_001.js' is also suspicious. The script's obfuscation and execution capabilities suggest it is designed to download and run a secondary payload.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `3ecde4f6ada3878a2d2b20ceb70627d345891a67265b0f3d92a7b497571af904`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	14449 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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