Malicious PDF — malware analysis report

Static analysis result for SHA-256 99e06dcf0fd39026…

MALICIOUS

PDF

6.5 KB
MD5: 897e1d116c17451b826026d35bfd17e1 SHA-1: b3f4e5c606bd4c53e2bd9e216d6db04e5f0cf6ac SHA-256: 99e06dcf0fd3902611bde650c71cd19df8942de51694b1543ce953e93308c88c
64 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell

The PDF file contains embedded JavaScript, indicated by PDF_JAVASCRIPT and PDF_JS heuristics. The JavaScript stream includes an eval() call and uses String.fromCharCode, suggesting an attempt to obfuscate and execute arbitrary code. While no specific malicious URLs or further payloads were extracted, the presence of these JavaScript features points to a malicious intent, likely to download and execute a second-stage payload.

Heuristics 5

  • eval() call high PDF_EVAL
    eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
  • JavaScript action low 1 related finding PDF_JAVASCRIPT
    PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules. (matched inside decoded stream)
  • 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. (matched inside decoded stream)
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • 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.w3.org/1999/02/22-rdf-syntax-ns# In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
objstm_0024_00.bin
1c3d7a0ee13f100e257c5f2cb19a16fa3ca507a5a8aae27f17e23b259928fdc7		 pdf-objstm-decoded PDF /ObjStm 24 0 obj (inflated) 503 bytes

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