PDF malware analysis — malicious · c8c8e8fe2ce50dea

MALICIOUS

PDF

11.7 KB

MD5: fc35e6d1d43ef35ccbf9bf4f990f4689 SHA-1: 8954652e2523a400d8f6eaf7d9ca1089fce959fd SHA-256: c8c8e8fe2ce50deaaa2007415e9c339ec2596dacf84e3da3646997c70f94e542

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by multiple heuristics including PDF_JAVASCRIPT and PDF_JS. A critical heuristic, CVE_2007_5659, specifically points to the use of 'collab.collectEmailInfo' for JavaScript execution, a known method for exploiting PDF vulnerabilities. The presence of deobfuscated JavaScript files further indicates malicious intent, likely to download and execute additional payloads. The ClamAV detection confirms 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` `67e0b4198457ae33e32d350a33e9d1b76c6a4317ef4ea2bff56a752b3913f8c9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11867 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8af5296bb432b346e3d4c3a6bc20c5c45aacc485e0fb72d533945ee57d41d053`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4883 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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