PDF malware analysis — malicious · d47e848f126566f4

MALICIOUS

PDF

4.6 KB

MD5: 1f08bdd67ea5462c8aa329909a700141 SHA-1: 274138f0af771d95dada4fda63c5775a4ea6b9cd SHA-256: d47e848f126566f48bef8b7c51881bba9a1e417f7ad9ca5a4b3ea889b6d48797

128 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File Execution: User Execution: Malicious File

The PDF file contains embedded JavaScript that utilizes eval() and String.fromCharCode, indicating obfuscation and dynamic code execution. The critical CVE-2008-2992 heuristic firing confirms the use of a known PDF vulnerability to launch JavaScript. The extracted JavaScript streams, particularly 'numeric_charcode_stage_000.js', are likely responsible for downloading and executing a secondary payload, although the specific URL or final payload could not be determined from the provided static analysis.

Heuristics 6

util.printf — CVE-2008-2992 critical CVE exact CVE_2008_2992

PDF JavaScript calls util.printf() — CVE-2008-2992 is a stack buffer overflow in Adobe Reader triggered by a long format-specifier argument. Widely exploited in the wild after disclosure. (identified after JavaScript deobfuscation)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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)
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0005_000.js` `a7ee58af13eace199a5c9f93620bcecf64e33ce40ccd8fa9ecc6a485d41dbf8b`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	25219 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s).
`numeric_charcode_stage_000.js` `42a80fc366a675e51a1d0fd5dd3691616ae971207ea3f2e86ca6fd08bb630a06`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	7407 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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