PDF malware analysis — malicious · d4791b4db6042ebc

MALICIOUS

PDF

860 B

MD5: a2981f9d99cf4290aecfc741c0972e2b SHA-1: 0d9514c8807b6347a61eab16f2ba1a74eba49d87 SHA-256: d4791b4db6042ebc93dbec8039987edd3eaaef0b8af3fdf52a83b6f92cb56684

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF and JavaScript. The JavaScript stream is obfuscated using unescape() and String.fromCharCode(), suggesting an attempt to hide malicious code. The primary function of this script is likely to execute further malicious actions or download additional payloads, as suggested by the 'Suspicious extracted artifact' heuristic. No specific family could be identified due to the generic nature of the obfuscation.

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` `0d57bef7020df112399f0717ae8a15d42626556e0e5c32f3e943f8e605bf46f2`	pdf-javascript-stream	PDF /JS object 5 at offset 0x156	442 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s).

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