Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f38c7316d86a19f…

MALICIOUS

PDF

45.1 KB
MD5: 889823dfc8072e3b24c9be4ed3237933 SHA-1: 165068f5c9d66f5d64246ed8776b7823d0ceb572 SHA-256: 1f38c7316d86a19fab81e33424a60683af8d1a1efb35bc416e5c3c8388227afa
84 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file exhibits multiple heuristic firings related to JavaScript and XFA forms, with a critical ClamAV detection for obfuscated objects. The embedded JavaScript stream, though obfuscated, is a common technique for delivering malicious content. The presence of embedded URLs, even if some are benign, suggests an attempt to connect to external resources. The primary attack pattern involves leveraging PDF features to execute embedded scripts, likely for downloading further stages of malware.

Heuristics 5

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
27e7ca8b0afe5e7ffaf753d0700aff0b734f6ba362d92b51d54de2d11baf164b		 pdf-javascript-stream PDF /JS object 12 at offset 0xA1EC 3501 bytes

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