PDF malware analysis — malicious · cc3cef58a0861740

MALICIOUS

PDF

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

MD5: 5a6fbb60ed282c3597a8befed25f1caa SHA-1: 9422e3190925df58e0382fa796b4b5807c78f208 SHA-256: cc3cef58a0861740124985a6fe88d4d537832d9c02ee7190c6ffe4e010789e8f

308 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

This PDF exploits multiple known vulnerabilities (CVE-2009-4324, CVE-2009-0927, CVE-2007-5659) by leveraging embedded JavaScript. The JavaScript uses functions like eval() and unescape() to deobfuscate and execute malicious code. The primary intent appears to be the execution of arbitrary code, likely to download and run a second-stage payload.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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)
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 8

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0032_000.js` `16f06b21cc37b7303bbfc4187e44eee6a7d17040b0ed434bfb550a1a5bcad330`	pdf-javascript-stream	PDF /JS object 32 at offset 0x417	129 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0034_001.js` `446d7151da60bc322fd903dc6ff8ea07397e858eb1d24c475effdf2041594495`	pdf-javascript-stream	PDF /JS object 34 at offset 0x4D2	124 bytes
`javascript_obj0036_002.js` `40303c1e78a90a2f5a78bc988bf4eb41b7e357d10343106716d569798931beff`	pdf-javascript-stream	PDF /JS object 36 at offset 0xFF	133 bytes
`javascript_obj0038_003.js` `626164afe8063cc6d66923cd739af5ee8979965f4c65be851815285a36450c76`	pdf-javascript-stream	PDF /JS object 38 at offset 0xC32	158 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`javascript_obj0078_004.js` `cb43d3898650d9fa28e90e218e4f3118db16f42c812e3e031a84e6e92503d5ad`	pdf-javascript-stream	PDF /JS object 78 at offset 0x7C	37 bytes
`legacy_pdfkit_stage_000.js` `e3cae6abdeaa0e9a10d7a8b785480f141ac65d11328eac2a557f7c6d703ef19d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x5BE	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` `051fc16bec19ecc0064abb65d0dd4330559bae8af624c220631304180e993f80`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0xD5B	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` `03475f753ce491e0d93cbbfa54e178dc4788105f3c1021b0dda24f62a737c756`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x13C5	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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