PDF malware analysis — malicious · 2d42a609b92c5ebf

MALICIOUS

PDF

12.0 KB Created: 2011-72-51 03:25:00 Authoring application: String.fromCharCode

MD5: 6f898f880153e23cecb4cfd49fff610b SHA-1: 4f148718404fef4de7125ced568b10006ad04afb SHA-256: 2d42a609b92c5ebfc8d7e8bf05d833bc53e86ec87e510fbf7be4d6ed228b0554

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream utilizes `String.fromCharCode` and `eval()` to obfuscate and execute code, a common technique for delivering malicious payloads. The `eval()` call is a high-confidence indicator of malicious intent. The extracted JavaScript file, `javascript_obj0001_000.js`, is likely responsible for further stages of the attack, such as downloading additional malware or establishing persistence.

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_obj0001_000.js` `ab41288e8b212ab411173a6cfcb4515212acbee9c86098a7cb9f4db9296729cf`	pdf-javascript-stream	PDF /JS object 1 at offset 0xA	524 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s).

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