Malicious PDF — malware analysis report

Static analysis result for SHA-256 af7d0eabad24abe3…

MALICIOUS

PDF

45.1 KB
MD5: f0baadead0d335902060d3efaa0c03b0 SHA-1: 349b6b3d19b1e4b581669796e46ed189b0e03d1a SHA-256: af7d0eabad24abe364c47bed7ff11d458ee30da14e44e1a038cc11cf51d09516
136 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and triggers heuristic alerts for JavaScript actions and obfuscated content, indicating malicious intent. The ML classifier strongly flags this PDF as malicious. The embedded JavaScript is likely responsible for downloading and executing a second-stage payload from one of the unknown-reputation URLs. The presence of XFA form elements and potential exploit indicators in the ASCIIHexDecode filter further support a malicious exploit attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • ASCIIHexDecode filter (with exploit indicators) medium PDF_FILTER_HEX
    Hex-encoding filter present alongside exploit delivery indicators — often used to hide payload or shellcode bytes
  • 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.gfhfghfghfgxfa.org/schema/xci/2.6/fghfghgfhfghgfhgffffffffgfgfgfgffg/
    • http://www.fggggggggggggggggxfa.org/schema/xfgggggggggggfa-template/24444.6/
    • http://ns.adobe.com/xdp/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0011_000.js
373decc2279334fd3a7cc66fff5b41ae40c9486239dd683a995b5fac4332673d		 pdf-javascript-stream PDF /JS object 11 at offset 0xA2D7 3319 bytes

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