PDF malware analysis — malicious · 4401c66ebdd50642

MALICIOUS

PDF

2.0 KB

MD5: 0750039a255248af71ceaac3b50a10f5 SHA-1: 8e2ba37bd831f645f8ea43cbf60d9b9d5f2fb7c5 SHA-256: 4401c66ebdd5064203579ecf5ae5be11237f9f40196cadb4e4f826ff442c5fc2

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 Scripting: JavaScript T1204.002 Malicious File: Malicious File

This PDF file contains embedded JavaScript that is obfuscated using unescape() and eval() functions, a common technique for exploiting vulnerabilities. The critical heuristic firing for CVE-2009-0927 indicates the exploitation of a known vulnerability in Adobe Reader via the Collab.getIcon method. The embedded JavaScript is likely designed to download and execute a second-stage payload, although the exact mechanism is obscured. The ClamAV detection further confirms its malicious nature.

Heuristics 7

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)
ClamAV: Pdf.Exploit.Agent-35930 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35930
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `f23e505f155bfa9b9f356fa9fddf8d7fcafcc37fc2df3878e575e72c00c819d4`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x6C7	697 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `e84974f4e4689e3fe2da91b03ebda6efcafdfeb407979407d630b1f72f0f1d66`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2625 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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