PDF malware analysis — malicious · 7aaf18efd342d0f4

MALICIOUS

PDF

691 B

MD5: 678599c9d0119a3aaff97431fdb501fa SHA-1: 44a131e8daab2639deb116aff2a5b03e0278394c SHA-256: 7aaf18efd342d0f4a830a514488a7ec534ea89cc2b547716c2a3460c246480b0

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded JavaScript that utilizes an eval() call. This JavaScript is designed to execute arbitrary code, likely to download and run a secondary payload. The ML classifier strongly indicates maliciousness, and the presence of JavaScript exploit indicators points to a common PDF exploitation technique.

Machine Learning

Nyx PDF Classifier malicious score 0.9999

Heuristics 4

JavaScript action low 2 related findings PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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.
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_obj0021_001.js` `81e95044d07cbbc6623547a310a30295de1447323de361f87688455dadaae509`	pdf-javascript-stream	PDF /JS object 21 at offset 0x17A	313 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
Preview script First 1,000 lines of the extracted script eval(app.alert("TEST")); endstream endobj xref 0 6 0000000000 65535 f 0000000017 00000 n 0000000087 00000 n 0000000151 00000 n 0000000240 00000 n 0000000275 00000 n trailer << /Root 1 0 R /ID [<C1AF6EADA45B1475970EB875230BAE93> <C1AF6EADA45B1475970EB875230BAE93>] /Size 6 >> startxref 364 %%EOF

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