PDF malware analysis — malicious · 6c363eb946c50be8

MALICIOUS

PDF

9.5 KB

MD5: d9968f15643ac22f8bbd012a62eced6a SHA-1: 22198faa22e6a0a8d3c8feb6709cca291a0c25ab SHA-256: 6c363eb946c50be8d4f28b59e032214d792a4ad856c698ea596605776068f335

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript that is obfuscated and uses an eval() call, indicating malicious intent. The JavaScript is likely designed to exploit a vulnerability within the PDF reader to execute arbitrary code. ClamAV detection as 'Pdf.Exploit.Agent-13427' further supports the malicious classification. The primary function appears to be the execution of a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 6

PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER

PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
ClamAV: Pdf.Exploit.Agent-13427 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-13427
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0016_000.js` `d5c1a6aa4028c29987d8ed50634517ad956ba08f0bd7385e3bb96e559ce192cb`	pdf-javascript-stream	PDF /JS object 16 at offset 0x2046	146 bytes
`stream_006_off0000224d.js` `4289b42c9fcbfe4dc4159e64fbfb9857982871902ba3c8cc599f7819f23b49e0`	decompressed-pdf-stream	PDF FlateDecoded stream at offset 0x224D	331 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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