PDF malware analysis — malicious · a203b52f6f18bab3

MALICIOUS

PDF

22.9 KB Created: 2011-72-51 03:25:00

MD5: ae32f0abda0a5c8135b5825742631ec0 SHA-1: 69283403bce14ff1c451efbe661131ca64a4a9c4 SHA-256: a203b52f6f18bab304509161339f83e68dd6e867439619310e4013708d5ec4bd

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests that the JavaScript code is likely obfuscated and designed to execute arbitrary commands. The ML classifier strongly supports the malicious nature of this PDF. The embedded JavaScript file, javascript_obj0001_000.js, is the primary artifact for further analysis.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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_obj0001_000.js` `eaa539e14ecabf0eeba2d046683c90d4b459f6c25e11f474e7552164657e6fe5`	pdf-javascript-stream	PDF /JS object 1 at offset 0x582A	662 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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