PDF malware analysis — malicious · b74f87545b6475a1

MALICIOUS

PDF

5.2 KB Created: 2008-12-03 13:57:41 UTC

MD5: c6571ac5cb6399359e6b00ad7dd18b38 SHA-1: 696d5ae06b2e62b651280f93904635ba6cd4189d SHA-256: b74f87545b6475a158dd837951d7afbc164c65ad2e450a09c5d12e675326f729

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The presence of an eval() call and String.fromCharCode() suggests the script is obfuscated and likely executes arbitrary code. The ML classifier strongly flags this PDF as malicious. While the exact payload is not discernible due to obfuscation, the techniques used point to a malicious PDF designed to exploit vulnerabilities and execute code.

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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0006_000.js` `13729f899d233d1a9bdef9a0e98133503b05d225ef81efadf9564c991a9aa196`	pdf-javascript-stream	PDF /JS object 6 at offset 0x157	8692 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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