PDF malware analysis — malicious · 36524ddb7d564779

MALICIOUS

PDF

11.9 KB

MD5: 34706d2367981d2150d4ee01a5247fe9 SHA-1: 8f24fd9ab94595f0b87f06f5a945a400383a395f SHA-256: 36524ddb7d564779948e37d16d93065224f8b42f907cc9f6ef9356dfe296f13f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic indicates the exploitation of a known vulnerability using the 'Collab.collectEmailInfo' JavaScript function. This function is used to construct and execute further JavaScript, suggesting a downloader or dropper functionality. The presence of deobfuscated JavaScript files further supports this, indicating a multi-stage attack. The exact payload and ultimate destination are not discernible from the provided static analysis, hence the 'unknown family' classification.

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` `c0a5885ce4a2ccdf3474370b949714d5c608f4022927a996b967fe0593a39328`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12265 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7be93dd602918dccc89a31e66e8942230860ba6f5fb1580816ecae1f51edddb9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5070 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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