Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f197f7d20ef7884…

MALICIOUS

PDF

6.7 KB
MD5: 206fe0ca5c0b29a8b129f22e4212721e SHA-1: fff121c2b2e914a3856c1dc39cb1e1f4dbde98b1 SHA-256: 4f197f7d20ef788407a2b034d950f4e375db14158f2e1d0c8d5f3979a82b33d1
96 Risk Score

Malware Insights

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

This PDF document contains embedded JavaScript that exploits CVE-2014-0496. The script is obfuscated and appears to be a downloader for a second-stage payload. The exploit targets the app.addToolButton/removeToolButton functionality within Adobe products. No specific family could be identified, but the attack pattern is consistent with a malicious document designed to deliver further malware.

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)
  • 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
  • Suspicious extracted artifact info 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.
  • 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
d929ffe4f81135e93064b927b3965c35c02376b54d93d4e339e4945792b242dc		 pdf-javascript-stream PDF /JS object 3 at offset 0x409 15380 bytes
base26_stage_000.js
879cdfe09b60b30c3b144a9f08f2b53fd424433a07152744bb431cfb7190a8d1		 deobfuscated-js base26-decoded JavaScript (decompressed) at offset 0x60D 5853 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 44 eval/decoder/string-building token(s).

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