PDF malware analysis — malicious · 8be43f9b558a3aab

MALICIOUS

PDF

11.9 KB

MD5: fa66253c59e868b6987571dcdde32e24 SHA-1: d10bf59b423060da68eacfa3a37e9fbb4e1e8576 SHA-256: 8be43f9b558a3aab53ec3bcd86e7f5cdfe42306457afb75db6bfb3ed2283d6d5

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability via the 'collab.collectEmailInfo' method. This JavaScript is designed to download and execute a second-stage payload. The heuristics indicate the use of JavaScript actions and embedded JS streams, consistent with exploit delivery. The ClamAV detection further confirms the malicious nature of the file.

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` `d35d60a23a61056f6d02a4289920bf248b835501f2a01dd403de3611bf75ae77`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12100 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d0adee0fb989593cd4372037478e5cd74c472cff76c2013a0d10ee2a9b0d595d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4943 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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