PDF malware analysis — malicious · 730ebe97fa686130

MALICIOUS

PDF

12.9 KB

MD5: 7a5f7c5ab0e9d1af7c202b816352ddc4 SHA-1: d70382e9071916aa3080bf968b9ddb6b42037a77 SHA-256: 730ebe97fa686130f1b43afbe1c085f1864721c866917e7e8f9b305f49eb9df3

146 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 appears to be obfuscated. The script decodes a string using character lookups and then evaluates the result, likely to download and execute a second-stage payload. The critical ClamAV detection and high-severity heuristics confirm the malicious nature of the file, pointing towards an exploit dropper.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 4

ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
PDF metadata JavaScript eval stager high PDF_METADATA_EVAL_STAGER

PDF JavaScript reads document metadata fields such as title, subject, or producer, decodes character data with parseInt/String.fromCharCode style helpers, and evals the recovered stage. This is a high-signal exploit-kit staging pattern.
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.

Extracted artifacts 1

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `8095748cabb3e604afacf4da6e8cd3a4b32b50e3a2b0dc8fd63cb976e9f7bbba`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3189	331 bytes

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