PDF malware analysis — malicious · 1df236e6cb99d41e

MALICIOUS

PDF

11.7 KB

MD5: 2b62dc39d5f90750f93f168af9badb4f SHA-1: 81145c3da122d45683a244e57a759663137facb5 SHA-256: 1df236e6cb99d41e50e5d7bf89f139f0ce988fe67ce1f628eba2dbb65d288443

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 CVE-2007-5659, indicating an exploit attempt. The extracted JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are likely responsible for the malicious execution. The ClamAV detection further supports its malicious nature. The exact payload or behavior of the JavaScript is not fully discernible without further dynamic analysis, but the exploit vector is clear.

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` `a7fb0b5be23e680dea9cb4b391bd3317d9264a12cde643d0251d543d9a299491`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12120 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `1c14b2ab15bb85457bce98a0bc1948419e85ec1603d4c839cba222d7cba7e5e5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4944 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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