PDF malware analysis — malicious · 61096870d6b03ff2

MALICIOUS

PDF

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

MD5: a47316a2a2760b23e16a85305954123c SHA-1: 287730667dcc7cc4c21430032d022e4b80e27133 SHA-256: 61096870d6b03ff21b089f14bc21b8f54e0f4e829e1b9fd020f59e8996ec93e7

268 Risk Score

Malware Insights

MITRE ATT&CK

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

This PDF file contains embedded JavaScript that utilizes eval() calls, a common technique for obfuscating malicious code. The heuristics indicate a PDF JavaScript exploit cluster, and ClamAV detection confirms it as Pdf.Exploit.Agent-36118. The JavaScript is designed to execute arbitrary code, strongly suggesting it acts as a downloader for a secondary malicious payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 7

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-36118 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36118
ClamAV detection on extracted artifact critical EXTRACTED_FILE_CLAMAV

ClamAV flagged at least one file extracted from inside this sample. Even when the wrapping document carries no AV detection of its own, a hit on the carved artifact is a strong indicator the sample is a delivery vehicle.
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` `8d6837eacae028d2f9c6c4b5dda51495263f211609bee2b355e681b2f950544e`	pdf-javascript-stream	PDF /JS object 13 at offset 0x336	13573 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 12 long base64-like blob(s).
`javascript_obj0013_001.js` `8a5c9ba360d9089826c18d932c984c2d1a03eb70b38bab10185f067f52df8fa1`	pdf-javascript-stream	PDF /JS object 13 at offset 0x359	14279 bytes
Detection ClamAV: Pdf.Exploit.Agent-36118 Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 12 long base64-like blob(s).

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