PDF malware analysis — malicious · 784bc4e50cf61791

MALICIOUS

PDF

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

MD5: 6f1f99fb147700e91a3d6ddc48fdcc95 SHA-1: fb07aa6296fae4708a1ad31d93f33621318a8ea8 SHA-256: 784bc4e50cf617913e98bd78f05d2c69e77bf0c622d8b1348027a77b05c69cb6

198 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

This 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 JavaScript, which is further obfuscated and extracted into multiple JS files. The primary function of the embedded scripts appears to be downloading and executing a second-stage payload, as indicated by the 'legacy_pdfkit_stage' filenames and the nature of the exploits. The file is classified as malicious due to these exploit attempts.

Heuristics 6

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)
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `1c341403cde208a7b27f3d9e39d6aaa123f1deffab3c423752f1c09dc90a213b`	pdf-javascript-stream	PDF /JS object 32 at offset 0x30A	243 bytes
`javascript_obj0034_001.js` `cb1c7effb2a2a9dd0a3f72605002e4579c3ea505bc2687c585d10b13b87c88ca`	pdf-javascript-stream	PDF /JS object 34 at offset 0x3F5	387 bytes
`javascript_obj0036_002.js` `030bd1c88bac10708900e6526976c855a0059b02199191595e0eb2b853e83874`	pdf-javascript-stream	PDF /JS object 36 at offset 0xAC	214 bytes
`legacy_pdfkit_stage_000.js` `73da873531a4746bb19470afff326f821fcbb280b91605764cc793b16d853ba5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x530	1657 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` `a6ae0ecba3e216f4ba31a010622497210977477d40a49a010cfb2698fec3e9a4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xAC6	1809 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` `5bf3a7a59c2bde72baaf2a76e9e294afa36a2afa273a1e6df252251981fd8b95`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x1039	2967 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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