PDF malware analysis — malicious · ce01d9968e98f076

MALICIOUS

PDF

4.4 KB

MD5: fbedb17017852b26162c105ec475860f SHA-1: f2597a9cf1e1564e56eaff60123fc308483c9189 SHA-256: ce01d9968e98f0769fd06bbea99f14bea106dbfe3a9af3442d5470cfe9c5a88d

126 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript that is obfuscated and uses eval() and String.fromCharCode. The critical CVE-2008-2992 heuristic indicates that the PDF launcher concatenates info fields, extracts characters at a fixed stride, and evaluates the result, likely to download and execute a second-stage payload. The presence of eval() and util.printf strongly suggests arbitrary code execution.

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` `e489ca343037f48f08050eed860af17434eeae48dd1f72646014df0641910c06`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	23419 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` `3e25b229b0ffa4fe2cef4152d898c3e34926361849f93729af3345dd3cc76cfa`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6877 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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