PDF malware analysis — malicious · eeeb2dde074abcaa

MALICIOUS

PDF

4.1 KB

MD5: b6799ed7f2d8ebe61bb6cfe063897c4d SHA-1: 9e24b97acc83a132b924ac83dc2730e76bc3c827 SHA-256: eeeb2dde074abcaa1e50f4fcc59a44c08b78957cf725308279502c533d38dd94

66 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, indicated by the PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream exhibits obfuscation and uses eval() and String.fromCharCode(), suggesting it's designed to execute arbitrary code. The deobfuscated JavaScript file 'acroform_b64_00.js' likely contains the logic for downloading and executing a secondary payload. The presence of these obfuscated scripts and the PDF structure points towards a malicious document designed for initial payload delivery.

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` `f23c00c16daa992f48fcd04f2758847e670989b3873d964dc4c1319ac091c6b0`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6373 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` `ab6484866b31f3f240aacee696468deff359ed760d29dda94ed1ae654938c42c`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3625 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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