PDF malware analysis — malicious · 19ade830008d10d9

MALICIOUS

PDF

12.8 KB

MD5: 2ed92dbb0b15fafeecc8a607c7b1a90d SHA-1: 72455f0757829a8ffc3f0eebccb69b6a5f261b35 SHA-256: 19ade830008d10d98da242d2d9f0652e1afd1a44b4ef5b856256c2fba8c3253d

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 a 'PDF_JAVASCRIPT' and 'PDF_JS' firing. The script decodes a string using character lookups and then evaluates the result, which is a common stager technique. The ClamAV detection 'Pdf.Exploit.Dropped-94' further confirms its malicious nature. The primary attack pattern involves exploiting the PDF format to deliver and execute a secondary payload.

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` `add7b09ade2ed3cfdbbc6b3147b3c8d3507c12989ba01d3ad6514331ffad1430`	pdf-javascript-stream	PDF /JS object 76 at offset 0x3141	331 bytes

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