PDF malware analysis — malicious · 8a79c2e040d2d822

MALICIOUS

PDF

12.0 KB

MD5: cd4eafe87f6ab09498dcec87a24846de SHA-1: 752b27a61eb052c398a403eaf9ebce93ab221b87 SHA-256: 8a79c2e040d2d822594301a71b0c320e398360ef9e41b7b8604d0e320dd5a79f

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659, specifically related to the 'Collab.collectEmailInfo' function. This indicates the file is designed to exploit this vulnerability. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') suggests a multi-stage attack, likely involving the execution of further malicious code. The ClamAV detection further supports its malicious nature.

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` `19ceed7c651ee9a66d8cb76d15dbcc6425384d94562b80028a5b07b5080c6f96`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12277 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `7b57cd0806a1b2f25cd7f84cf7b9ea1ed4fb445d183c180c5438efc9750a1ee5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5098 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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