PDF malware analysis — malicious · de8b17dc61237cae

MALICIOUS

PDF

11.9 KB

MD5: 06d2620eb49ba5a087cdb23d629f0b30 SHA-1: 4403f887e14f7041fd53f67b7e9eef90b6e7e70c SHA-256: de8b17dc61237cae5d95b0607db04bbeda6c198bc63739dbe887091bd0c54ab2

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' firing specifically points to a known exploit technique involving the 'Collab.collectEmailInfo' JavaScript function, which is used to construct and evaluate malicious code. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') and the ClamAV detection ('Pdf.Exploit.Agent-36065') further confirm its malicious nature. The script's likely intent is to download and execute a second-stage payload, a common tactic for PDF-based exploits.

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` `4705e8eb20cdc0c0036ebdd44577688550c799f75d28b6214bb779426ad4c676`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12216 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `bbacbf1f86736c970941c45b40e8b0224371f0f7d5185fa41e434e8a4a1ed14f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5019 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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