PDF malware analysis — malicious · b3766c3316035442

MALICIOUS

PDF

4.3 KB Created: 2008-08-06 01:42:27 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: f3bcea386bef63347c0e2929ff21f90a SHA-1: 1b3c1e52e71a896aedfb99cdece3d4517e8f1fd3 SHA-256: b3766c33160354423aa8eb4176f135e9523bc068fc9083f2abde16566a9a43da

208 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file exhibits malicious behavior, flagged by critical heuristics for CVE-2008-2992 (util.printf) and ClamAV detection as Pdf.Dropper.Agent-7294696-0. The presence of embedded and deobfuscated JavaScript streams, along with a high ML classifier score, indicates the file is designed to exploit PDF vulnerabilities. The JavaScript likely attempts to download and execute a second-stage payload, as suggested by the dropper classification.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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.
ClamAV: Pdf.Dropper.Agent-7294696-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7294696-0
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits
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.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0013_001.js` `f774669565910f902e2afed482b2b95280d93fa46e1e64985ee81306192254b9`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3DC	2777 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0013_002.js` `ccf2321c10603a144998814c8ba4506ed643967fc174d1864a7479a5e3c06ba2`	pdf-javascript-stream	PDF /JS object 13 at offset 0x402	3413 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`combined_document_js_000.js` `6c9e25e80ffe594232a93744a6c0d6be698a814ea183e7569dfa9fb41fcb54af`	deobfuscated-js	combined document JavaScript streams at offset 0x11	6211 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 4 eval/decoder/string-building token(s). Carved artifact contains 2 long base64-like blob(s).

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