PDF / .TXT malware analysis — malicious · 471032906c680f15

MALICIOUS

PDF / .TXT

1.9 KB

MD5: e67e4b010ed2dfd2cc55d0e55b958438 SHA-1: 613b78ce9496d8c0e938da1bee24ab9400211b9f SHA-256: 471032906c680f15829313eb5fbbccf67bc9e592478b9b16c419d21735297d66

188 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1059.007 JavaScript T1204.002 Malicious File

The PDF contains embedded JavaScript, which utilizes eval() and unescape() functions, indicating obfuscation and execution of malicious code. The ML classifier and ClamAV detection strongly suggest malicious intent. The JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the presence of multiple JavaScript streams and the 'Pdf.Exploit.Agent-35930' ClamAV signature.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Exploit.Agent-35930 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35930
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
JavaScript action low 1 related finding 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.
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_obj111611_000.js` `f23e505f155bfa9b9f356fa9fddf8d7fcafcc37fc2df3878e575e72c00c819d4`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x66C	697 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `f39402482a24d48a616513a404e75d047b8fc70f7655376298d9fb9e26807696`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2822 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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