PDF malware analysis — malicious · 82e94281fc3fc1cc

MALICIOUS

PDF

4.3 KB

MD5: c825a1c1896c7e3d9c5a385ab1bba030 SHA-1: 2b501063fbb91e9f29af6b0edda520ed94b51ed1 SHA-256: 82e94281fc3fc1ccb3f1738e4f0560fc28cbead3ca100ebb824f4d7439aa7c7a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF document contains embedded JavaScript that utilizes eval() and String.fromCharCode, indicating obfuscation. A critical heuristic identified the CVE-2008-2992 exploit, specifically using util.printf to decode and execute JavaScript. This suggests the primary function is to leverage this vulnerability to run malicious code, likely a downloader for further stages. No document body text was available for analysis, but the script behavior is indicative of a malicious exploit delivery.

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` `d897190424e0edabdb07f4d0648b0ff2fcc27eec9d228fd60e4a5bad8b551566`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	22348 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` `f46a04de7e32acc09f7d54fb524d54357ddc029d447595718911e41de18fc369`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6578 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).

Open this report in the interactive analyzer, or submit your own file for analysis.