PDF malware analysis — malicious · aaeaad39252ab161

MALICIOUS

PDF

8.8 KB Created: 2009-06-22 13:26:31 Authoring application: jhVeIgtUcOmpeDTVDQwc (via WqhKJEKsSECHOerEnd)

MD5: 1b841359758802543d78471b22134938 SHA-1: 4330d0e4befe211bede93c4b7b7e6590b5903cd8 SHA-256: aaeaad39252ab161758af0f0270c12d15233ab199342cf0cedc1a0461c999021

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

This PDF file was flagged as malicious by an ML classifier and contains embedded JavaScript streams. The JavaScript appears to be obfuscated, utilizing String.fromCharCode and eval() calls, which are common techniques for hiding malicious code. The presence of these obfuscated scripts strongly suggests the document's intent is to download and execute a secondary payload. The extracted file names 'javascript_obj0007_000.js' and 'javascript_obj0007_001.js' are indicative of embedded script objects.

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.
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_obj0007_000.js` `3ad6ead4e9e531f57d9f284c3f467735d9aec924dac5b401d7e52b6e8ebbc1b6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x3B3	5892 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`javascript_obj0007_001.js` `e80fa6ed7526df7175d3da823a33c53769ec827b7f79fdcb2bde60fb321c25f0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x3B3	2562 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.