PDF malware analysis — malicious · 1a68f181ff089330

MALICIOUS

PDF

1.95 MB

MD5: e6e4a90ec728adca4704fb25cc844ecf SHA-1: 310e45ead23da8144500861b55397b73fa63394a SHA-256: 1a68f181ff089330284bb3dcde3ffce18f15212b942d4f6e2dc3eb3fcadcf868

158 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell

The PDF contains embedded JavaScript, including a stream with an eval() call and String.fromCharCode usage, indicating obfuscated code execution. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript likely downloads and executes a second-stage payload, as suggested by the 'Pdf.Dropper.Agent' ClamAV signature.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

ClamAV: Pdf.Dropper.Agent-1828643 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-1828643
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_obj111711_000.js` `db9a7e33ccd2a44f51e3d3c5619a8b708b2f079837d244d2a0a43f8431ced47b`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x197	2438 bytes
`javascript_obj111712_001.js` `0ff9816b5fa4246f642f3e6ef19419a15828f119db875ed85d4deddcc56adabc`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x860	617 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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