PDF malware analysis — malicious · b707516618e12e9d

MALICIOUS

PDF

61.6 KB

MD5: cc175bcaabf7e212304f48b75b40e3c5 SHA-1: 9657e1d6737e3f83ea486488b273b37a555bf844 SHA-256: b707516618e12e9da6c415e7306307c98aaed05941963cdfcdc75e59e9afb573

358 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script: JavaScript Execution T1204.002 Malicious File: User Execution: Malicious File T1190 Exploit Public-Facing Application

This PDF file exploits several critical vulnerabilities including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. It uses a character-table indexed JavaScript stager to reconstruct and execute malicious code, likely to download and run a second-stage payload. The ClamAV signature 'Pdf.Exploit.Agent-36310' further confirms its malicious nature.

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-36310 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36310
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` `d65d1096b1fdfc7f452799dfe6a02f02b189bbc67898ca3031b199d07da2e840`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2D4	54349 bytes
`eval_char_append_stage_000.js` `3d394a56c8d1e9d7113ed7478ea948f6caca825e9eadbbcb433ef0efd03a29f3`	deobfuscated-js	eval character-table append decoded JavaScript at offset 0x300	3882 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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