Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2525eb28cc16bc6…

MALICIOUS

PDF

6.7 KB
MD5: 72d2a9cae260a9c32e5264cde173eaae SHA-1: 99fd66dbd53c4df23800e93f1f25125f48d2b167 SHA-256: c2525eb28cc16bc6f7f5e14c0e57ddd673c39efb11892e97a24d81e97fb40033
132 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious File: Malicious JavaScript

The PDF file contains embedded JavaScript that exploits CVE-2014-0496 via app.addToolButton/removeToolButton. The JavaScript is further obfuscated and decodes a base26-encoded stage. This stage is responsible for downloading and executing a second-stage payload, indicated by the 'Suspicious extracted artifact' heuristic. The primary attack vector is the exploitation of a known PDF vulnerability to achieve arbitrary code execution.

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
d08c7bcb433915b584d747df97a9f10676cff1fc04d2cc7c39083f2ec2aebff6		 pdf-javascript-stream PDF /JS object 3 at offset 0x409 15454 bytes
base26_stage_000.js
ed4c2d8a8fd540deb755273ac6402f999ebcda1379cc811328e31a85298f5a49		 deobfuscated-js base26-decoded JavaScript (decompressed) at offset 0x60D 5883 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.