PDF malware analysis — malicious · 3e2066fe7c558147

MALICIOUS

PDF

4.1 KB

MD5: 931a435b445213d278311854b2521b85 SHA-1: 95b3d2847e1ba8cbc9a88a0e7fb852e952d40ef5 SHA-256: 3e2066fe7c558147664edb52ed93af0fcd0e5ac1927af28c3a1989c9b4ded1d9

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File: User Execution: Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes an eval() call and String.fromCharCode, suggesting obfuscation and dynamic code execution. The deobfuscated JavaScript file, acroform_b64_00.js, likely contains code to download and execute a secondary payload. The presence of these elements strongly suggests a malicious intent to deliver further malware.

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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `a8c7bd5761c668025df340ae2f691bd217f34475e3d53b417208704e98d96030`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6401 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`acroform_b64_00.js` `36a23b4b8ef23abbb9aae6341c1fbcd4011bfd27283c57277c64db7c416cb246`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3648 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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