PDF malware analysis — malicious · a30fb83cdd790495

MALICIOUS

PDF

28.7 KB Created: 2010-03-17 02:18:35 Authoring application: V8mkPUCiFZgrnJ (via RHFzTmsbBAn)

MD5: d1523e7f9750ad0ef6c94ce9959868bb SHA-1: 61d3ac0f17071846773ca48dda0e7ecab97505d5 SHA-256: a30fb83cdd7904954d8138a802fdf9487e6b0733dc71e7c7b8a946d38439b6da

66 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 a high-confidence PDF_EVAL call. The embedded JavaScript stream, named javascript_obj0007_000.js, is likely responsible for the malicious behavior. The obfuscation and use of eval() suggest an attempt to download and execute a second-stage payload. The document body is unreadable, providing no further context.

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.
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_obj0007_000.js` `957d64a49632b716d1dfec268f2a8b7831b4545a25501ffee5cafa345ce935cb`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23D	28125 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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