PDF malware analysis — malicious · fe6084fb57c027dd

MALICIOUS

PDF

3.2 KB Created: 2008-07-28 19:47:35 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: 28e0aff1784241be86118f0df3bc308c SHA-1: e73f787bb9500f0a0fbb41c2525189fbd2306c49 SHA-256: fe6084fb57c027dde2dd8d57fdcc364bf9436d2cfde858b064b6fe3a9af11e2b

98 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, which is obfuscated and uses eval() calls, indicating malicious intent. The ML classifier strongly flagged this PDF as malicious. The deobfuscated JavaScript likely downloads and executes a second-stage payload, though the specific URLs or execution commands could not be reconstructed due to the obfuscation.

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_000.js` `2eeb06697ef956384451fa814cb2c03eae9fd2a7a41890d59e8b23f0353a74fe`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	5473 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`deobfuscated.js` `25035d923bab919a31c19174148822f6a20954cfb04b3449b07020422e1f5538`	deobfuscated-js	PDF JavaScript deobfuscation pass	13006 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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