PDF malware analysis — malicious · c72f454ab69c0edf

MALICIOUS

PDF

4.0 KB

MD5: 17d1ddae008942158287e969c6c01f0c SHA-1: 8623b475272ce36cb88e3daa0aa137d511214130 SHA-256: c72f454ab69c0edf0617502467f284ef89b6e1959175ede0daed71e3d9073e19

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, including a critical CVE-2008-2992 exploit that uses `util.printf` and `eval()` to execute obfuscated code. This script is designed to download and execute a second-stage payload, as indicated by the presence of deobfuscated JavaScript files. The attack pattern is consistent with a malicious PDF used for initial compromise.

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` `2da1250fb45a146196025be0863bb6456ff57e7e80bae562e338e0b73eb0a491`	pdf-javascript-stream	PDF /JS object 5 at offset 0x107	20422 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` `406d2775fb6bc7e896c8141c94ff95f41ba5823d1ff150f7f6e5e7ddbe7f311a`	deobfuscated-js	numeric char-code string decoded JavaScript at offset 0x115	6020 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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