PDF malware analysis — malicious · 593283562d455f3a

MALICIOUS

PDF

11.8 KB

MD5: f4a9c6eb777b6aadad05934d55231a9f SHA-1: cb995928cfcd3431560be5d6c4310319391c60ed SHA-256: 593283562d455f3a120d8cb18e02b67970ef099cdcbf46aa618a23850319d56f

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 use of a known vulnerability (Collab.collectEmailInfo) to execute JavaScript. This script is likely designed to download and execute a second-stage payload, as suggested by the extracted JavaScript files and the ClamAV detection signature Pdf.Exploit.Agent-36065. The obfuscated nature of the embedded JavaScript and the presence of multiple extracted JS files point towards a multi-stage attack.

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` `f1bda46442a47b6a0ac1bfec0df87b70e77432551d970b4c9cd102e5861928ca`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12285 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ae3e575bb285482eebb082f9af6b09088176ab732417505d886421b46ba16100`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4995 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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