Malicious PDF — malware analysis report

Static analysis result for SHA-256 1cb7b122c199aba4…

MALICIOUS

PDF

161.1 KB
MD5: d244f644823495e926cb5536924b0621 SHA-1: 745898655a5d6ba16f5de4a5764905bb040d2061 SHA-256: 1cb7b122c199aba41fbbd855f48ea3fc06ed389bddd86fe9030bf832592b36a1
144 Risk Score

Malware Insights

The sample is a PDF file that exploits CVE-2010-2883, a known vulnerability in Adobe Reader related to font parsing. It contains embedded JavaScript, which is often used to download and execute further malicious content. The presence of XFA form elements and obfuscated object names further suggests malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4937

Heuristics 6

  • Adobe Reader CoolType SING font exploit — CVE-2010-2883 critical CVE likely CVE_2010_2883
    PDF embeds a TrueType/OpenType font with an actual SING table and pairs it with JavaScript heap-spray shellcode. This matches the public Adobe Reader CoolType SING exploit shape for CVE-2010-2883.
  • ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
  • 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
  • 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/2.6/
    • http://www.xfa.org/schema/xfa-template/2.6/

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
c4ba3591c3074e8fbc2f51681f2267ae4d6650196a96437268cf3aa864f515e3
pdf-javascript-stream PDF /JS object 12 at offset 0x2784A 5835 bytes