PDF malware analysis — malicious · a71a744801f4d31a

MALICIOUS

PDF

7.2 KB

MD5: 9c2ce83bb5eee934e12c14f6a0ffb441 SHA-1: 2ebd167963f5fc284ce051d375c02f6a964b2952 SHA-256: a71a744801f4d31aaf9061b03ba89410f886b7b6484edbc18107bdd57ab2d6a4

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT, PDF_JS, and PDF_EVAL. The ML classifier strongly flags this as malicious. The presence of an eval() call within the JavaScript suggests dynamic code execution, likely to download and execute a second-stage payload. The specific content of the document body was unreadable, but the technical indicators point to a malicious script execution attempt.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

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.
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_obj0009_000.js` `cfdb415a88675fbd4eb7dfe15c1e49d395c152cb3a63445946a43e692b2c705a`	pdf-javascript-stream	PDF /JS object 9 at offset 0xD6	10223 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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