PDF malware analysis — malicious · df73fb2a04e5eb7c

MALICIOUS

PDF

3.3 KB Created: 2009-05-31 15:33:12 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: a885513c5602c1cf5885fa1dcbd2d6ac SHA-1: c737fb578b410a7453275db70adeaaf21ef7e99a SHA-256: df73fb2a04e5eb7c7e2f21cd71aa4b3b6f45843423c3d0b6d3d941a73f965d5a

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The 'PDF_EVAL' and 'PDF_FROMCHARCODE' heuristics suggest the JavaScript is obfuscated and uses dynamic code execution. The ML classifier strongly flags this PDF as malicious. The deobfuscated JavaScript likely downloads and executes a secondary payload, although the specific URLs or execution commands were not directly extracted.

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` `c98a5d7e06d35221afa1418a487843bda7eaca81b5014f7c28796696698c7a92`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	5944 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` `59cda7fd107816c6e5fd273b42ac2f418202b66f39ef4aba153a7f6ee7dc81f0`	deobfuscated-js	PDF JavaScript deobfuscation pass	17881 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).

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