PDF malware analysis — malicious · a69599ea1a2dee1f

MALICIOUS

PDF

61.1 KB

MD5: 9f9da21f1e53a91c2616289bf7a43167 SHA-1: 8525dbed3c7e3681b82c8a61298c43b95cc2d54a SHA-256: a69599ea1a2dee1faa30bd8eeffef0c986092f04edf9bd0aabb7f3d7aaefcaf2

358 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Exploitation for Public-Facing Application T1059.001 Command and Scripting Interpreter: JavaScript T1059.003 Command and Scripting Interpreter: Windows Command Shell

This PDF file contains embedded JavaScript that utilizes character-table indexing to reconstruct and execute malicious code. Critical heuristics indicate exploitation of multiple Adobe Reader vulnerabilities including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The recovered JavaScript is likely designed to download and execute a secondary payload, as suggested by the 'char_table_stage_000.js' artifact and the ClamAV detection of 'Win.Trojan.Agent-36331'.

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: Win.Trojan.Agent-36331 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Win.Trojan.Agent-36331
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.
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `9e70058449792a7f598bc10f7f2a378cb6022a1190a8a93cdf1cf8bec5c7a934`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2D4	53932 bytes
`char_table_stage_000.js` `cc998f974e8b370b72f3564e959b23932259a1c3d1dcc1d15d0bd9c9eb68fccf`	deobfuscated-js	char-table indexed JavaScript (PDF /JS object 76) at offset 0x324	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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