PDF malware analysis — malicious · c3c2709adfc18942

MALICIOUS

PDF

61.4 KB

MD5: 4ae0c0268b4a3f19a79da02811750292 SHA-1: 29d23138dea3dfb8815037e4e7ea86b76ae3fcb8 SHA-256: c3c2709adfc18942bb557f213a92b97eb9eab02810d00b1a8e7bd59e273a9432

396 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell

The PDF file contains obfuscated JavaScript that leverages multiple critical CVE vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, CVE-2008-2992) to execute code. The primary JavaScript stream appears to be a stager that reconstructs and evaluates further JavaScript from a character table, likely to download and execute a second-stage payload. ClamAV also detected this as Pdf.Exploit.Agent-36395.

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-36395 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36395
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.
Suspicious extracted artifact high 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0076_000.js` `05cb4e2371a7f7aac9eaa999b29f05e54dc51ad3d3a2df7c5b4f06b89e4cf79a`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2C2	54185 bytes
`eval_char_append_stage_000.js` `2a98fce9b8e639bc186ba7e980a10e032756a01a8dc6a5b01049294c513c7318`	deobfuscated-js	eval character-table append decoded JavaScript at offset 0x326	3870 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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