PDF malware analysis — malicious · beff83b7af41afad

MALICIOUS

PDF

2.0 KB

MD5: 339c02477ab5b859db449f4412318ab4 SHA-1: 873334ebcb1e4bd40c8da213d495324fc81a7d55 SHA-256: beff83b7af41afaddca991c14350db8ac4080f59c4f324d67c478e9140bfdca2

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream utilizes unescape() and String.fromCharCode, suggesting obfuscation to hide its malicious intent. The primary function of this script appears to be downloading and executing a secondary payload, as evidenced by the suspicious extracted artifact 'javascript_obj0005_000.js'.

Heuristics 5

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (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_obj0005_000.js` `b16653d7630966e91389bf8caa8a7609658f2c008629ab1a3d7eca8276078163`	pdf-javascript-stream	PDF /JS object 5 at offset 0x156	6247 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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