PDF malware analysis — malicious · 4f67625781f844ff

MALICIOUS

PDF

17.3 KB Created: 2010-03-15 09:18:34 Authoring application: GccY3wZaPF9qo (via MlMbISqzBMdI)

MD5: c3fcb21fc1e4535be4783d45eae2b23c SHA-1: 9e997f1f0156b28f5b26f8a39b65198833a8e077 SHA-256: 4f67625781f844fff7b5a232e9fd2863a5ef2362626996db1f7319ffe1c764a2

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL rule firing suggests that the JavaScript is being used to execute arbitrary code, likely to download and run a secondary payload. The PDF_FROMCHARCODE heuristic further points to obfuscation techniques used within the script. While the exact functionality of the script is obscured, its presence and the use of eval() strongly suggest a malicious intent to compromise the user's system. No specific family could be identified.

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` `d00e3a279b0e6c6eee78eb17bcc658ed594faa17a37ed860bc227f28d46408d7`	pdf-javascript-stream	PDF /JS object 7 at offset 0x244	16465 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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