PDF malware analysis — malicious · 8b1aca9375d321e9

MALICIOUS

PDF

12.5 KB

MD5: a26d21b5631111889c92b22ff9a06f59 SHA-1: eb97e65e36d6bfaa1850e54b669905e25f82faa3 SHA-256: 8b1aca9375d321e95dfe1e70a3e7d8fdfa9ee024ef7c7566a740703b014db362

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. This exploit is designed to execute arbitrary JavaScript, which in turn is likely used to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this analysis.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `87fef090ff041d3ae2e288ff1c91a08a203e4074ac922ce42f6d5dbed74f23be`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12231 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `783dae32c0167155e2c6595ce27707ba880308336356905d4142d5b9507a0f08`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5026 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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