PDF malware analysis — malicious · aa6fefc572a9c75f

MALICIOUS

PDF

4.1 KB

MD5: 944c04e2806f9ba7ed1ea99117e83f5d SHA-1: 1f3ce9be41d875c6905b253a1b38fbe5a581fe80 SHA-256: aa6fefc572a9c75f795143bdfcbc49a1d2f1a111b1971868717e70c7a606cba0

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, along with the presence of deobfuscated JavaScript in 'acroform_b64_00.js', suggest that the script is designed to execute obfuscated code. This obfuscated code likely downloads and executes a secondary payload, a common technique for malware 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` `bee28fc371eeec8f7da3920cafc4f8bad8258c56af825887127ad7938ba28898`	pdf-javascript-stream	PDF /JS object 13 at offset 0x368	6433 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` `d754c4ae5974ee5d0d31699e76a59b2e7e1e48f079d09060d1acadd1c11c6605`	deobfuscated-js	PDF AcroForm base64 (decompressed) at offset 0x99D	3670 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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