PDF malware analysis — malicious · fca3ff4008d5f6da

MALICIOUS

PDF

8.9 KB

MD5: d8c28db086d331e3040601795f9e66ab SHA-1: 7d47e34063b1a9b707df3605280d2f42f51d49a3 SHA-256: fca3ff4008d5f6da8de42a6b106ecca3f5920cafb2eb8586e934c7bc927d11b1

96 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious File: Malicious File

The PDF file contains embedded JavaScript, including a call to eval(), which is highly suspicious. The ML classifier also flagged this PDF as malicious with a high probability. The JavaScript is likely intended to execute a malicious payload when the user interacts with an AcroForm button.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

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.
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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_obj0057_000.js` `d1569c10a2a215b275f1b6e2a67e07a265d1d53868b1eb3e40c862abbdeb9985`	pdf-javascript-stream	PDF /JS object 57 at offset 0x191	1591 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`acroform_b64_00.js` `19c8842ae7027bd9591f11395242d18dc7ce7d334d5791a26d9215efffc94c49`	deobfuscated-js	PDF AcroForm base64 (raw) at offset 0xE68	3714 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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