PDF malware analysis — malicious · 27aa0409ebd44142

MALICIOUS

PDF

4.1 KB

MD5: d93a36fa0370f039d460036e0cd2721b SHA-1: 866fba35ddee5d3be376e8db71120acb5b7f04ff SHA-256: 27aa0409ebd4414295099c320c1e5faeebb8daa79c10b82bd2dce1b369b8c0e0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file was flagged as malicious by a machine learning classifier with high confidence. Static analysis revealed embedded JavaScript, including the use of eval() and String.fromCharCode(), indicating obfuscated code execution. The presence of these indicators suggests the script is designed to download and execute a secondary payload. No specific malware family could be confidently identified.

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_obj0013_001.js` `49ccec36f0948445f23168efddcf4d40fe8cf69190d0cd473fa7201ef900171b`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6285 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `316b65fb838a9f3c0139e361811fc9c9113d05bc9ee6b85a6ea0ef30ba277777`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3559 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).

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