PDF malware analysis — malicious · 02cd25cfb9b2f80b

MALICIOUS

PDF

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

MD5: b444d7ce90bcc1615114156228e71dc1 SHA-1: 462e053664ecbc558429910738b27e2e584dc390 SHA-256: 02cd25cfb9b2f80b32ee5043d0f0685b9b01b7ec0596c208299b771cc1da4c7b

228 Risk Score

Malware Insights

MITRE ATT&CK

T1203 Exploitation for Client Execution T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains multiple critical heuristic firings indicating exploitation of CVE-2009-4324, CVE-2009-0927, and CVE-2007-5659. These vulnerabilities are used to execute embedded JavaScript. The JavaScript code, particularly in legacy_pdfkit_stage_000.js, attempts to construct and execute shellcode, likely to download and run a second-stage payload. The ML classifier strongly supports the malicious nature of this PDF.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `d9ca5ed1d03e66d3c15c089455dad6b23a3a535975e7c5c1d1cca3b79edd8b7b`	pdf-javascript-stream	PDF /JS object 32 at offset 0x342	269 bytes
`javascript_obj0034_001.js` `b66e5a075dda92fd3ead71c2e289903516f1e8eca26b72753c349f186c45ec18`	pdf-javascript-stream	PDF /JS object 34 at offset 0x439	325 bytes
`javascript_obj0036_002.js` `c966502fb6753e479b7881484b1b26d705fa9a26b589ce1b8e7667389d67888b`	pdf-javascript-stream	PDF /JS object 36 at offset 0xBC	224 bytes
`legacy_pdfkit_stage_000.js` `2177691c72c7500f9286de874c9386117a49c6bfed0e841b017e890a01a99ea6`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x577	1544 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` `027a476bfb11f120f4511efb84985be79aa56776f3d324a08dca3c1588f363e1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xACF	1710 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` `824b7d6ddd542bd5652b9c7fd93f818223b9095e3edf86f5fc46e2b5c69ddc4c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x100A	2758 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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