PDF malware analysis — malicious · 0822afae4c278a59

MALICIOUS

PDF

9.3 KB Created: 2010-05-20 10:03:39 Authoring application: r6uLd0IUGlTs2 (via NyuVxkZp)

MD5: b2e3e965c26c1bc574ae47bb13a11d2e SHA-1: 8bfebf58da0118defc8fce6ecb010c78d4b3f3e9 SHA-256: 0822afae4c278a592c8f5f0477dd3c2b983058868d89c2babba9cb63d9684f08

148 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 an eval() call, indicating an attempt to execute obfuscated code. The ML classifier strongly flags this as malicious, and the JavaScript exploit cluster heuristic confirms the presence of exploit-related code. The script's truncated nature prevents a full analysis of its payload, but it is highly probable that it attempts to download and execute a secondary malicious file.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 5

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.
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 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `ba3c89beec02f39385f997b66f7fee75872cdf1be0ff45e170d62208864cf1b5`	pdf-javascript-stream	PDF /JS object 7 at offset 0x23A	8097 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).

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