PDF malware analysis — malicious · ed9550bb22dc5f7d

MALICIOUS

PDF

5.3 KB Created: 2008-12-03 13:57:41 UTC

MD5: 3b00e6b217b82efeedc79776831115e1 SHA-1: 034c668283e8387e43e925cbf6bcc3244619b363 SHA-256: ed9550bb22dc5f7d5c45707f52627bbc7218dfa3d18a355b111d6d54c0315faf

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 PDF_EVAL and PDF_FROMCHARCODE firings suggest that the JavaScript is obfuscated and uses dynamic code execution. The extracted artifact 'javascript_obj0006_000.js' is also flagged for script obfuscation. This points to an attack pattern where the PDF acts as a dropper for malicious JavaScript, which in turn likely downloads and executes a second-stage payload.

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. (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_obj0006_000.js` `7251676531df4f27c99d0bb4c4ef721673f79962a1b21b639135b2bcf9ae9fde`	pdf-javascript-stream	PDF /JS object 6 at offset 0xC5	8785 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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