PDF malware analysis — malicious · 3614a12dc65ef793

MALICIOUS

PDF

11.9 KB

MD5: b027cffae1d931672ea40525513f0f7a SHA-1: f0aa57ea67e1141e23b82532df59c171d0a71d16 SHA-256: 3614a12dc65ef7930169b7022b46dedab8cea22319fbc823ff0ef1e4496a3313

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, specifically identified as exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. This JavaScript is further deobfuscated into two files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The presence of these JavaScript streams and the specific exploit signature strongly indicate that the PDF is designed to deliver a malicious payload, likely by downloading and executing additional malware. The file type and exploit method point towards a common PDF-based exploit delivery technique.

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` `f0730a79a5491da8c6dd9b2a79c104ed3a330e4113cb87a2b3c7f9fc2c2792e4`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12215 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6afa1d87f036f110b6ed30bf5e4d5beb71b6ed6c1fd313a7a445c99ab1090822`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5051 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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