PDF malware analysis — malicious · dd40f56a83738071

MALICIOUS

PDF

82.1 KB

MD5: be31448e0218e5d5d9ce3804d03c2ca8 SHA-1: 1b34a4fdc30d6406fc93a82465ed54f3f7cbf31c SHA-256: dd40f56a837380716e492ccd1b6c44573d8c7b47b04f1c665e71db29fb7976c4

88 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious Link/URL

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2009_4324' firing suggests exploitation of a known PDF vulnerability to execute this script. The script is likely designed to download and execute a second-stage payload, as evidenced by the embedded URLs pointing to 'www.imagepdf.com'. The presence of obfuscated JavaScript streams further supports malicious intent.

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.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `b7e03d1736eb0d70c10f0aa3cb3705a7eff4b830f8551cf36fd441fe0f35ce95`	pdf-javascript-stream	PDF /JS object 7 at offset 0x130	41209 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` `1aa454f8fff74021f7c146afb31d034a761ead88f42783b5dc6a3c632dc21a39`	deobfuscated-js	numeric array XOR decoded JavaScript at offset 0x130	9741 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).

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