Malicious PDF — malware analysis report

Static analysis result for SHA-256 44935eb697c6b85e…

MALICIOUS

PDF

6.8 KB
MD5: 33e4a698ce74e174e0e1695966fe7252 SHA-1: 13bedac8a8c43d615cd9b06065e1f06076ba6857 SHA-256: 44935eb697c6b85ead89a019824177d519c2b0d37b130a64a0802d7ef3c28b53
94 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that leverages the CVE-2014-0496 vulnerability through app.addToolButton/removeToolButton. This script is designed to decode and execute a base-26 encoded second-stage payload, identified as 'base26_stage_000.js'. The primary function of this script is to download and execute further malicious content, indicating a downloader or droppper attack pattern.

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
e16b3954eb9ae15ee651b402c02acdf8e4ddf0173ea9f661659591223ad7ab0c		 pdf-javascript-stream PDF /JS object 3 at offset 0x409 15470 bytes
base26_stage_000.js
e2eccd4649cfb0940791efe3c5a90d2e00a962f647a7f0b17ff4358b445d9875		 deobfuscated-js base26-decoded JavaScript (decompressed) at offset 0x60D 5889 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.