PDF malware analysis — malicious · 36184db81a7a28c9

MALICIOUS

PDF

132.6 KB

MD5: 140150f81d67f355e30de0a29d6b0a72 SHA-1: 99ad74a2b5e71eb885d5ac2bc3637842bd1cf1fb SHA-256: 36184db81a7a28c9bb4c0d8b16ac1ed0d2060c882c5e85d45a272f22e8c14340

418 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious JavaScript T1059.001 Command and Scripting Interpreter: PowerShell T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript that utilizes character-table indexing to reconstruct and execute malicious code. This technique is used to exploit several known vulnerabilities in Adobe Reader, including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The deobfuscated JavaScript, recovered as 'char_table_stage_000.js', likely serves as a stager to download and execute a second-stage payload.

Heuristics 9

media.newPlayer — CVE-2009-4324 critical CVE exact CVE_2009_4324

PDF JavaScript calls media.newPlayer — CVE-2009-4324 is a use-after-free in Adobe Reader's multimedia plugin triggered by media.newPlayer(). Actively exploited as a zero-day in December 2009. (identified after JavaScript deobfuscation)
Collab.getIcon — CVE-2009-0927 critical CVE exact CVE_2009_0927

PDF JavaScript calls Collab.getIcon — CVE-2009-0927 is a stack buffer overflow in Adobe Reader triggered by Collab.getIcon() with a crafted argument. Allows arbitrary code execution. (identified after JavaScript deobfuscation)
Collab.collectEmailInfo — CVE-2007-5659 critical CVE exact CVE_2007_5659

PDF JavaScript calls Collab.collectEmailInfo — CVE-2007-5659 is a buffer overflow in Adobe Reader triggered by a long argument or heap-sprayed message field passed to Collab.collectEmailInfo(). Part of a series of Acrobat JS API exploits. (identified after JavaScript deobfuscation)
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-36388 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36388
JavaScript action low 2 related findings PDF_JAVASCRIPT

PDF contains a /JavaScript action. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
Character-table JavaScript eval stager high PDF_JS_CHAR_TABLE_EVAL_STAGER

PDF JavaScript reconstructs an exploit stage by indexing into a small character table, appending hundreds of one-character fragments, joining the array, and evaluating the result. This static fallback fires only after the bounded decoder recovers an exploit-like stage, so it catches this obfuscation even when no single CVE API signature is available.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `28f035c667a3115de99aa7e4c4952f46263cfcd2b37d90640b1b32e423828976`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2C2	119416 bytes
Detection ClamAV: Js.Exploit.HTML-27 Obfuscation or payload: unlikely
`char_table_stage_000.js` `319082dc1c6dc430f861ee291093eac591435a00c53a5aaefb239c6b84e9205f`	deobfuscated-js	char-table indexed JavaScript (PDF /JS object 76) at offset 0x2DC	3858 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 11 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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