PDF malware analysis — malicious · 3db8195e09f6b415

MALICIOUS

PDF

4.4 KB

MD5: 0c5c8907dc59b127dd4d4c1ceaff28cf SHA-1: c3cfe4404301459538296481522e9fa4135175ea SHA-256: 3db8195e09f6b41598ec376dea22c0e896f924b69a596d550ae4377477fd279e

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript that utilizes eval() and String.fromCharCode, indicating obfuscated code execution. The critical CVE-2008-2992 heuristic firing confirms the use of util.printf to construct and execute JavaScript, a common technique for exploiting PDF vulnerabilities. The embedded JavaScript is likely designed to download and execute a second-stage payload.

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` `7f61e2b5ee4bece53a6d848493be0c8acef8abc896e73b5c54d67d4623e8cac9`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	23176 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` `46907adb3d976775ec317435cebc62c7ce076962cdbd638d04a60a97b858c9c3`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6826 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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