PDF malware analysis — malicious · aa43cb757cda08a9

MALICIOUS

PDF

11.6 KB

MD5: ca4e1a3d8e87d6952c999da1d38cfd8b SHA-1: 87cabe1da3dd7352fa3bd66e110e1736fa99a2e8 SHA-256: aa43cb757cda08a95bb479e7f2a37d239acfdc013c539a6dea64a6821548afd6

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical heuristic 'CVE_2007_5659' specifically points to the use of the 'collab.collectEmailInfo' JavaScript function, which is known to be used in PDF exploits. This function is used to construct and evaluate JavaScript code, indicating an attempt to exploit a vulnerability. The presence of deobfuscated JavaScript files further supports the execution of malicious code. The overall purpose appears to be the exploitation of a PDF reader vulnerability to initiate further malicious activity, likely a download and execution chain.

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: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `259ba72e507b289665a9993c7e583d8451dda74518d1860af23ac0a2868e5cda`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11934 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6bf4f3966cc99f9978ac8cb00ea9ef4a1ff5902271062bb1813f2b60e0fcd09a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4839 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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