PDF malware analysis — malicious · 901000de5682e648

MALICIOUS

PDF

1.5 KB

MD5: 0374072369f4d46201b4847a5bb47cb5 SHA-1: dd873a0d986a0ee3b738e8d8231afadfeddefa51 SHA-256: 901000de5682e64874f006ee73c1e96c990e987536efa2800aaf2159cdeccff3

66 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings related to PDF JavaScript actions and streams. The JavaScript is obfuscated, as suggested by the unescape() and String.fromCharCode() calls, and is likely responsible for downloading and executing a secondary payload. The presence of these elements strongly suggests a malicious intent to compromise the user's system.

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` `977fba6af177970c87c839442e4758398cfc2e1b6c3e6e90b28f00f5ba1f06a0`	pdf-javascript-stream	PDF /JS object 5 at offset 0x156	3528 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s).

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