Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac42a66c3105b5c…

MALICIOUS

PDF

58.9 KB Created: 2006-02-16 15:03:51 -08:00 Authoring application: lice (via ubst)
MD5: ec8a53f24999a620f6305dca1bb897aa SHA-1: 694b2b8a7831e6670efaa767733c9521389cb6f0 SHA-256: 1ac42a66c3105b5c346290a41192cec5cd6e3bedfad31386b7ca4e002b3586c0
108 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious File

The PDF file was flagged as malicious by ML classifiers and ClamAV with the signature Pdf.Exploit.Dropped-94. It contains embedded JavaScript, indicated by heuristic firings and the presence of a large JavaScript object. This JavaScript is likely responsible for downloading and executing a secondary payload, which is a common technique for PDF-based malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • ClamAV: Pdf.Exploit.Dropped-94 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Exploit.Dropped-94
  • 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.

FilenameKindSourceSize
javascript_obj0076_000.js
fa29628b2ddc15f34abe5e55c525636090f623d5c1e484acdd33281875850fa6
pdf-javascript-stream PDF /JS object 76 at offset 0x955 50360 bytes