Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a25a80c7f7acbd1…

MALICIOUS

PDF

44.6 KB
MD5: ef3ae347bad444c2723f3c4349cd7154 SHA-1: 5fdf6aa7eec0c013e14404d75f11ba9a8753f0e2 SHA-256: 6a25a80c7f7acbd1d93e1298c1c7dd5c7c57140bdbdeed61d7a62870e01ae32e
178 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1203 Exploitation for Client Execution T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, flagged as a critical exploit cluster, and is detected by ClamAV as a dropper. The JavaScript is obfuscated but appears to download and execute a payload from an external source. The presence of XFA forms and JavaScript actions strongly suggests an exploit targeting PDF reader vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 7

  • PDF JavaScript exploit cluster critical PDF_JS_EXPLOIT_CLUSTER
    PDF combines an executable JavaScript/action surface with exploit staging indicators such as eval/unescape/fromCharCode, XFA script content, or a related CVE pattern. Benign form JavaScript remains low-severity, but this correlated cluster is high-confidence malicious behavior.
  • ClamAV: Pdf.Dropper.Agent-1506676 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Dropper.Agent-1506676
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.bitstream.com
    • http://ns.adobe.com/xdp/
    • http://www.xfa.org/schema/xci/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
2848b169c095b03cf42e682951b8905e8ecf2111f2686134539bf0892d05ada8		 pdf-javascript-stream PDF /JS object 7 at offset 0x877 1008 bytes
font_00_sfnt_off000010ed.bin
044efaa0fcddad6a1afc97a6bd112675dff8d542f6a622fb73e7eb17d43d90f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10ED 65932 bytes

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