PDF malware analysis — malicious · 2f09c05b1652ac4e

MALICIOUS

PDF

3.3 KB Created: 2008-07-26 19:43:58 Authoring application: Scribus 1.3.3.12 (via Scribus PDF Library 1.3.3.12)

MD5: e97e3eacf3f32c2dbdeea04390424770 SHA-1: b6b63c37c384200764d9393b7d6cb9cb77eba6b6 SHA-256: 2f09c05b1652ac4e5a84fa49f441b6d2ff51517d11d4f2f7165faf052643f937

188 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that utilizes eval() and String.fromCharCode() functions, indicative of obfuscation. The critical heuristic firing for CVE-2008-2992 confirms the presence of a JavaScript layer designed to exploit Adobe Reader. This layer likely decodes and executes a second-stage payload, leading to arbitrary code execution.

Heuristics 7

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)
ClamAV: Pdf.Exploit.Agent-35551 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35551
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_obj0013_000.js` `9ce977f8eaa7bed30ab257c169e50c0a45e6a655bf3b0557908570cf5b8e1de3`	pdf-javascript-stream	PDF /JS object 13 at offset 0x3CE	3595 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).
`custom_b64_stage_000.js` `9591d45da8dac0cdb39482fdff19422f2a41d09b6f303ae0ce6799c4c4a2ed30`	deobfuscated-js	custom Base64 decoded JavaScript layer 1 (PDF /JS object 13) at offset 0x734	2036 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).

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