PDF malware analysis — malicious · 050bcf93bc364d8d

MALICIOUS

PDF

8.5 KB Created: 2010-02-09 02:16:29 Authoring application: LxFZDkNeNIxldlDc (via VopLlwzDeJljJ)

MD5: 20b52cf9d0ee998a156d5b1da638461c SHA-1: 32b53e98bd1fb3842a70202daa28e67566628fc4 SHA-256: 050bcf93bc364d8d40950ab4cd457fa0d88f68f5553337c0012509b486db373b

176 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 is heavily obfuscated, but static analysis indicates it is part of an exploit cluster. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to download and execute a secondary payload. The obfuscated JavaScript is the primary indicator of malicious activity.

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.Exploit.Agent-35572 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35572
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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` `8c6ac196c3fe02bd7f947d2ac77a7601d6f1a177b5db2aeb81ba3a63bd63eb6b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x42B	6888 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.