PDF malware analysis — malicious · f284525d8941978f

MALICIOUS

PDF

64.4 KB Created: 2010-03-14 03:18:30 Authoring application: HZuLHzO0 (via FTUyEckkgZqc)

MD5: 7ca0ad09dff74c0b51a79f0957588ce9 SHA-1: 9c2999436dea1b80349d043390303ad05e234a8f SHA-256: f284525d8941978f0d16e624b25e38d3073a7f675523e0e8f6637892f628a846

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 heuristic firing suggests that the JavaScript code is likely obfuscated and uses eval() to execute, which is a common technique for malicious scripts. The extracted artifact 'javascript_obj0007_000.js' further confirms the presence of JavaScript. The script's intent is likely to download and execute a second-stage payload, although the exact functionality is obscured by the obfuscation.

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` `27a282a699ac497e7bc70223abc9fba03a354a3fb62c13aee354b809f0766e3b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x243	64681 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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