PDF malware analysis — malicious · 3dadefa66f879c8f

MALICIOUS

PDF

13.9 KB

MD5: 657a74590a16a5257057e03ab7d94ddf SHA-1: 3cc4a51acf004ed14390d7d335eafacfaf8c6e38 SHA-256: 3dadefa66f879c8ff08c152b7ffd530689c79417c662e7eff42ad0b232636cc9

86 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The JavaScript stream, named 'javascript_obj3332_000.js', is obfuscated and uses an unescape() call, suggesting it's designed to execute malicious code. The document body contains concatenated strings that appear to be part of JavaScript code, further supporting the malicious intent. The primary goal is likely to exploit a PDF vulnerability to run this script, which could lead to further payload execution.

Heuristics 6

unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX

Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
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.
ASCII85Decode filter (with exploit indicators) low PDF_FILTER_85

ASCII85 encoding filter present alongside exploit delivery indicators — uncommon outside of obfuscation
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_obj3332_000.js` `6d2c5951088e55177160db39ffbef53ed408932dd18c020d523d599702d4adbb`	pdf-javascript-stream	PDF /JS object 3332 at offset 0x35DE	341 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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