PDF malware analysis — malicious · 3fcbf5ab7e427e25

MALICIOUS

PDF

7.3 KB Created: 2009-01-35 62:12:26 Authoring application: Adobe

MD5: 335f6ebe7abeb589ef096d40408ff013 SHA-1: 7320cfa689f1cb4807d6eb53e66969c7b33216f9 SHA-256: 3fcbf5ab7e427e25f23c9803f976e9afdeaaed9314f3a89d42eb24722f41900e

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are leveraged through embedded and obfuscated JavaScript, including the use of eval() and unescape() functions, to execute malicious code. The ClamAV detection as Pdf.Dropper.Agent-7253478-0 further confirms its malicious nature. The primary function appears to be dropping and executing a secondary payload.

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)
ClamAV: Pdf.Dropper.Agent-7253478-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7253478-0
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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 7

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `63ad367d214a7ee2a1d0038295e0f6f7498662a5063c8b7e88dff3725ac6bd51`	pdf-javascript-stream	PDF /JS object 32 at offset 0x40E	126 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `ad343dafcd04cdd30ffc8fb68f6e28f160b38b2175c37be4410ebf7001812ca8`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4C5	115 bytes
`javascript_obj0036_002.js` `e56242e323d71a0b3691bca9212ce1badbccc183a33e1980fab047c9b9a9a912`	pdf-javascript-stream	PDF /JS object 36 at offset 0xF9	118 bytes
`javascript_obj0038_003.js` `7f0c54a3703ab8379aa52c46883e47f89b506a91252ab7ec8858bbb7cfd5b032`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC23	146 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `7f075c798bdd2c46b054986e3248758b1da2ecf9a5fbf1a2d56e4faa6079a596`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5AB	1634 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `f46878b71619b60d97d18dde358b3d082ea121af997ec1b5c43ec9cc099ea195`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD3F	1800 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_002.js` `612d96a32f59b3c6d7f01852a4939ab0f75facbd2db1bd3dda4261cf8321f764`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13AB	2938 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 6 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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