PDF malware analysis — malicious · a3e31fd5ed985da6

MALICIOUS

PDF

11.9 KB Created: 2010-07-25 10:32:51

MD5: bd5861a216be6f42262e4a4365421692 SHA-1: e6862bcf5d4571005e22fc7f30931769586e2947 SHA-256: a3e31fd5ed985da692a431c3aef05d94dacad592454e86f66607e4d7d0b6bbfb

328 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.001 Malicious Link: Malicious JavaScript T1059.003 Command and Scripting Interpreter: Windows Command Shell

This PDF file exploits multiple known Adobe Reader vulnerabilities including CVE-2009-4324, CVE-2009-0927, CVE-2007-5659, and CVE-2008-2992. The exploitation involves a JavaScript stager embedded within the PDF's metadata, which is designed to execute arbitrary code. The ML classifier strongly indicates maliciousness, and the presence of multiple critical exploit firings confirms the attack vector.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

Heuristics 8

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)
PDF /Producer character-range JavaScript stager high PDF_INFO_PRODUCER_CHAR_RANGE_JS_STAGER

PDF metadata hides JavaScript in /Producer as character ranges plus a long numeric index table. The document JavaScript rebuilds an alphabet from those ranges, maps the indexes into characters, and evals the recovered exploit stage. The decoder is bounded and only fires when the recovered stage contains exploit-like Acrobat JavaScript.
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `62b12edd69f5f59d2752fbd6bf08c7acd84349d4dbea7af876f3aa9bcc61cc68`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2C3A	482 bytes
`javascript_obj0007_001.js` `ae452785fb6c6f1c6388847a7ae3b7cdc39db1ea29ad6ecc44836fcf4cb42f0b`	pdf-javascript-stream	PDF /JS object 7 at offset 0x2C3A	104 bytes
`producer_char_range_stage_000.js` `81e05096b286fad13a76ff823ec1cfc1475994e925d39e3ee5f07e16860c0b51`	deobfuscated-js	PDF /Info Producer char-range indexed JavaScript at offset 0x19A	3611 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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