PDF malware analysis — malicious · e158d538ca3da0ed

MALICIOUS

PDF

23.6 KB

MD5: 95eece550b3e28f0967cea25779766f6 SHA-1: 1824788dc334bec9d026c48ac759ff1b6c68a911 SHA-256: e158d538ca3da0ed9ef7f3a1c3350ba7367e37fb7a54994196e5403fe8214350

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that utilizes eval() and unescape() functions, indicating an attempt to execute arbitrary code. The critical CVE-2009-0927 heuristic confirms the exploitation of a known vulnerability in Adobe Reader via JavaScript. The embedded JavaScript streams and deobfuscated stages suggest the primary goal is to download and execute a second-stage payload.

Heuristics 5

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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_obj111711_000.js` `f54c5d59530ec2e3a427071c5ec38792ff23537b9b35fa383ab11f399ab02ebb`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3787 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `4f9aa22ea1f7562d55b9d33383a86dfff5c7cc45db3573a8abe29a61a62d8bbb`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x108F	18030 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111713_002.js` `7834fdac384a8a3ab55a9bd89fec11db12617f690cbcca7f50385505edb79062`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5733	1752 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `f89df567ac1524aa97d7d1c2e318640fc4fa1525d608905c9904da2f1b756863`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x108F	1520 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` `8425255975cf6a0ca148e2f0dd7dc3b402385ac0106f29fbe1499aa4a9ed33cc`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5733	108 bytes
`legacy_pdfkit_stage_002.js` `05679548bfa9f4860982d6b10816fa973dca07dbf3c3558f6319d5a0df035036`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x108F	1629 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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