PDF malware analysis — malicious · 6c6e8dbfb430955c

MALICIOUS

PDF

13.4 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: ad5ef9ffb29f406cbda4b7eb5985c875 SHA-1: a0fc7fcac34f7e4d1d0b8bf831fe709a6e430d39 SHA-256: 6c6e8dbfb430955c8033af80566740e55346c43c66fc9e7a7bedaaf24e82022a

208 Risk Score

Malware Insights

MITRE ATT&CK

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

The sample is a PDF file containing obfuscated JavaScript. The JavaScript utilizes eval() calls and string concatenation to construct and execute code, indicating it is designed to download and execute a secondary payload. The critical PDF_JS_EXPLOIT_CLUSTER and ML_NYX_PDF_MALICIOUS heuristics, along with ClamAV detection as Pdf.Dropper.Agent-7270063-0, strongly suggest malicious intent.

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.Dropper.Agent-7270063-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7270063-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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_obj0013_000.js` `55aed2e60e9cc005b1a9c35f1a6a5df933f41cd08827ba53b8e80bf4792a66d8`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	12202 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).
`javascript_obj0013_001.js` `974da1e22da6eb804d2586054852142504bb8da2fd5127d77793cfa80e76e2a4`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	12908 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s).

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