PDF malware analysis — malicious · 9772b5e12083afe2

MALICIOUS

PDF

12.5 KB

MD5: f1c0d67e7c55c39a39ad0a4aaab929a9 SHA-1: dfd7d929fc107c29f5bfde5973ee5a9cb251b529 SHA-256: 9772b5e12083afe2c8aa79339a02cd38d973978a45f5dec6afb48811e719a89e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1204.002 Malicious File T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript and exploits the CVE-2007-5659 vulnerability using the Collab.collectEmailInfo method. This technique is commonly used to download and execute further malicious content. The presence of deobfuscated JavaScript files suggests a multi-stage infection process, typical of many malware droppers.

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` `a317288fc9422144f3a89fe785f6e2497fa4a61a5c87361e624afb1678e6162b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12232 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a973f0c4c83b2d3bea401956f583a7bbdb669577fee6117c1463c2fadba6e8f4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5022 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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