PDF malware analysis — malicious · 2f1684cb7189e8a6

MALICIOUS

PDF

60.8 KB

MD5: 110b65e98a04e3459ff916c7ae4a24ef SHA-1: 2add0fbd02363d7e8583965699d4a7b1a2d5c176 SHA-256: 2f1684cb7189e8a6f288b098883933e43a1399567e6c17b8da2c1fd04a6046cf

358 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.001 Malicious Link/URL: Malicious Link T1204.002 Malicious Link/URL: Malicious File

The PDF file contains obfuscated JavaScript that leverages multiple CVEs to achieve code execution. The JavaScript is reconstructed using a character-table eval stager, indicating a downloader or exploit loader. The specific CVEs targeted suggest an attempt to exploit older, unpatched Adobe Reader installations.

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` `f642743b8ba8c5c10ce90a8fd8ab2e2cb793aaa37c4267461c7a4852727e584c`	pdf-javascript-stream	PDF /JS object 76 at offset 0x2D4	53590 bytes
`eval_char_append_stage_000.js` `ffb0cbae85b60098f28b10da3ceb45cc9cb71c86cb76586b4cea458336e1b64f`	deobfuscated-js	eval character-table append decoded JavaScript at offset 0x300	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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