PDF malware analysis — malicious · efd058203bed6530

MALICIOUS

PDF

16.8 KB Created: 2010-03-11 14:18:52 Authoring application: aeizN9KTacMtPN (via JSl3Chjrk)

MD5: 25b20c50fdd60ffd9245bd41e673b1b3 SHA-1: f63863d96bbf7d7b600f8dc71467a691daf5f32d SHA-256: efd058203bed6530af7a423a02769aca2c797ded4f43b60b771b1322a7bd3ec8

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The presence of a PDF_EVAL heuristic firing suggests the JavaScript is obfuscated and likely intended to execute arbitrary code. The extracted artifact 'javascript_obj0007_000.js' further supports this. The script's purpose is inferred to be the download and execution of a secondary payload, a common technique for initial access.

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` `2bc1e93eda0a1bbb6764adc6286bb1a8504f580ccd845756f6f7bb1719783f89`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23B	16017 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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