PDF malware analysis — malicious · 77fcde658b9859c8

MALICIOUS

PDF

12.4 KB

MD5: c602b38d4753439e5d68361d3c97b6be SHA-1: aa1f993c7723f790d468d67acb1643fde90927b8 SHA-256: 77fcde658b9859c896b760046fa6031d77c4491c5e4428392a6f5c2219566be6

146 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. The script decodes a string using a custom character map and then executes it via `eval()`. This technique is commonly used to obfuscate malicious code and download further payloads. The ClamAV detection 'Pdf.Exploit.Dropped-94' further confirms its malicious nature.

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` `02ee812051e7581813ccd8a4b9060e25e5170b2bc750f660c25fe83a5ba17aa2`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2F69	331 bytes

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