Malicious PDF — malware analysis report

Static analysis result for SHA-256 df78f55a459c33bc…

MALICIOUS

PDF

6.7 KB
MD5: 53cff6af28630a2a10752ebd59458bd3 SHA-1: b7a4c54f137fa873fecf7ae029c0fa6edbe1f9fd SHA-256: df78f55a459c33bc919d0bc0786f87a0e239fb980b4c7f7585334e8ee16d3de7
132 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that exploits CVE-2014-0496 via app.addToolButton/removeToolButton. The JavaScript is further obfuscated and decoded using base26, indicating a downloader or dropper functionality. The primary attack vector is the exploitation of a known vulnerability in PDF readers.

Heuristics 7

  • app.addToolButton/removeToolButton — CVE-2014-0496 critical CVE exact CVE_2014_0496
    PDF JavaScript combines app.addToolButton() and app.removeToolButton() with heap-spray shellcode markers — the public Adobe Reader/Acrobat ToolButton use-after-free exploit shape for CVE-2014-0496. (identified after JavaScript deobfuscation)
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • 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
  • AcroForm button with action trigger low PDF_ACROFORM_BUTTON
    PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
  • 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/2.8/
    • http://www.xfa.org/schema/xfa-template/2.5/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0003_000.js
9fa21b54ca5ff3add869a94777919a0e3b21e5d7c53214524fa634e8b4018cc8		 pdf-javascript-stream PDF /JS object 3 at offset 0x409 15560 bytes
base26_stage_000.js
4f27952e0f40fb09dff9517cf20eff5f9c3fe871ec53e733d160d23003784a0b		 deobfuscated-js base26-decoded JavaScript (decompressed) at offset 0x60D 5925 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 45 eval/decoder/string-building token(s).

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