Malicious PDF — malware analysis report

Static analysis result for SHA-256 7bbc6797d711a76f…

MALICIOUS

PDF

6.8 KB
MD5: 0199406096e49bfcbda839c771fcb423 SHA-1: 9fa6e1a2d8cd073716f77cec13da466d63490c71 SHA-256: 7bbc6797d711a76f28b638d4df8d66f77e8c0500e3cf951b01587963823511ea
94 Risk Score

Malware Insights

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

The PDF document contains embedded JavaScript that exploits CVE-2014-0496 using app.addToolButton/removeToolButton. This script decodes a base26-encoded second-stage JavaScript payload, identified as 'base26_stage_000.js'. The primary function of this payload is to execute further malicious code, likely leading to a system compromise. The exact nature of the second-stage payload could not be fully determined due to obfuscation, but the exploit chain is clear.

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
61aced8ac24bc3ab22f83570724795506d0e36023ae19b21ffcbc9acd1ad4dbf		 pdf-javascript-stream PDF /JS object 3 at offset 0x409 15830 bytes
base26_stage_000.js
63c4f4accb4b8df82576c33daaee64c8ee63f93c39a34f401f0a78759cd019e3		 deobfuscated-js base26-decoded JavaScript (decompressed) at offset 0x60D 6033 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 44 eval/decoder/string-building token(s).

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