PDF malware analysis — malicious · 3e94661f43c252a3

MALICIOUS

PDF

12.2 KB

MD5: 1c40fa0a8e6f442caa3ae519afe85a27 SHA-1: 77812f258aa0225404a24852845da0bc43520327 SHA-256: 3e94661f43c252a36ed1b9353c91ce3ac78598d464eeaae3a7aef44e012bf3cf

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by heuristics as exploiting CVE-2007-5659. Two deobfuscated JavaScript files were extracted, indicating a multi-stage attack. The primary function of the embedded script appears to be downloading and executing a second-stage payload, as suggested by the presence of obfuscated code and extracted script files. The specific exploit used points to a known vulnerability in older PDF readers.

Heuristics 5

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)
ClamAV: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `ad22504fb3838511e6534ff75bf0942c7507ec4ebd0e17a3d2df284b270f5137`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5164 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `3bb57a1055ea75d7107cac401b4581d0b18357529bf34ff9e15db282f53c0ea0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12355 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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