PDF malware analysis — malicious · edea5b2b160352da

MALICIOUS

PDF

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

MD5: 0b46b8ea0bca778b5f9c07b091bbe176 SHA-1: 0efa90a0c4cbba31768d7394398ec7fb56f869e0 SHA-256: edea5b2b160352da9ab741669d34ba7a61ce53c378072a6f9224273f317f6078

338 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file exhibits multiple critical heuristic firings related to known Adobe Reader vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659). These vulnerabilities are exploited via embedded JavaScript, which is further obfuscated using eval() and unescape() calls. The ClamAV detection of 'Pdf.Dropper.Agent-7321246-0' strongly suggests this file acts as a dropper for additional malware. No document body text was available for analysis, but the combination of exploits and dropper behavior indicates a malicious intent to compromise the user's system.

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-7321246-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Dropper.Agent-7321246-0
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` `de8026cf92d80efd49d25ea5e790d57a68eda53923b706fad09c26346c249924`	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` `13389a34e0753694a7772861e10a88602340b591749cb94b1a6d439fc3aaabd4`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4C5	115 bytes
`javascript_obj0036_002.js` `783cc01e2e6d8bde93848ad5659fa24ef7136646b96ed3d5a035866891ff0c97`	pdf-javascript-stream	PDF /JS object 36 at offset 0xF9	118 bytes
`javascript_obj0038_003.js` `3a89ba3f580dcb04f96911c2c068e310b73b0aa57403863628ba40a33e759a98`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC1F	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` `cf296fd6462460b9c49d2f71fafb028e8e9c802052d36a73d5262ef7386bfe3d`	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` `3121fbf286de959743303cd19c92aa88c94ee9e77d2a0ca8022795394c441574`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD3B	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` `8ff24c6b7ed7ed41720d9d3866386165d4c2beb572dbf790508231eeca5b54e7`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13A8	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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