Malicious PDF / .TMP — malware analysis report

Static analysis result for SHA-256 2a64e0c337833d2b…

MALICIOUS

PDF / .TMP

1.16 MB
MD5: 9828ca4491f2e8aec482fb96820c1dd0 SHA-1: 72ffb0a3f99244f9b663dcaf942b5dd43850e3f6 SHA-256: 2a64e0c337833d2ba4f0749cc2996dffc790e5cfc6a71d4d3f1dc71e2df23dda
88 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1204.002 Malicious Link T1071.001 Web Protocols

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2009_4324' heuristic confirms exploitation of a known vulnerability. The embedded JavaScript is obfuscated and likely responsible for downloading a second-stage payload from the external URI 'http://www.imagepdf.com/'. The presence of obfuscated JavaScript streams and the exploitation of a CVE suggest a downloader or dropper functionality.

Heuristics 7

  • media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324
    PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (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.
  • String.fromCharCode low PDF_FROMCHARCODE
    String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape rules. (matched inside decoded stream)
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://www.imagepdf.com/)/S/URI
    • http://www.imagepdf.com/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0007_000.js
8c2ce46f3379f526a0b32f38f1b6a38c1c51660a1203fa052a7db5c5acc82934
pdf-javascript-stream PDF /JS object 7 at offset 0x130 41410 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).
legacy_pdfkit_stage_000.js
7a6b9efa5f35da105c641975b531a95b829735f78b2a580affa5fed623663638
deobfuscated-js numeric array XOR decoded JavaScript at offset 0x130 9801 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 2 eval/decoder/string-building token(s).