PDF malware analysis — malicious · b439dc748f2009df

MALICIOUS

PDF

5.1 KB

MD5: ac7962632e3878dc523ad941ac57eb15 SHA-1: 2003de50e0dad2ec53baf47e1eacd33250da62d3 SHA-256: b439dc748f2009df0168c150f2723ae78329b766328d8f45699efb1cb10494a4

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript, which is further obfuscated and utilizes eval() and String.fromCharCode() functions. This strongly suggests the script is designed to execute arbitrary code, likely to download and run a second-stage payload. The presence of JavaScript actions and embedded JS streams points to a common delivery mechanism for malware. The extracted artifact 'javascript_obj10783_000.js' is also flagged as suspicious.

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_obj10783_000.js` `5aa94376453f1df3d4df0915f2296032a1b1c1b64e2dd1da569dba7557f28bca`	pdf-javascript-stream	PDF /JS object 10783 at offset 0x139	8358 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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