PDF malware analysis — malicious · 369c1d70642d78f8

MALICIOUS

PDF

12.1 KB

MD5: d264a4d3610bfcb6d9de19aa4f7e7c80 SHA-1: afe06994f08b77d15ebeadda16fddb6bff747308 SHA-256: 369c1d70642d78f88f168114fc55607211497cb96cd78389b3e1347cfad4be69

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 through the 'Collab.collectEmailInfo' method. This method is used to deobfuscate and execute JavaScript, which in turn likely downloads and executes a second-stage payload. The presence of 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' further indicates a multi-stage exploit chain typical of PDF-based malware delivery.

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` `83dde65d979aad24f7c199cd5215a12b19b96eedc341622ce5305bb9d8643058`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12295 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e8485fcbf238d43853c08a7939b069f88af39c44be38d9ff948f13b736e66d19`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5054 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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