PDF malware analysis — malicious · 4458ee8724ebb084

MALICIOUS

PDF

12.0 KB

MD5: bc695cc01133a1d0db0f556a2d0d071e SHA-1: 887bc764957a1c9b1fa7baff244f8da8ff9b81ab SHA-256: 4458ee8724ebb0849e2f0f75bbf125c0ba0ce4b9f75cffcf6e3f5fdd3e855800

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 'PDF_JAVASCRIPT' and 'PDF_JS'. A critical heuristic, 'CVE_2007_5659', specifically points to the exploitation of a vulnerability using JavaScript that is concatenated and evaluated. This indicates the file's primary purpose is to leverage this exploit to run malicious code. The presence of deobfuscated JavaScript files ('legacy_pdfkit_stage_000.js', 'legacy_pdfkit_stage_001.js') further supports the execution of a malicious script. The ClamAV detection 'Pdf.Exploit.Agent-36065' 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` `dfb4aa2e39a4f11d7b43975cccb53071d9731841081ed08d96ba81d40cca988f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12224 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6dfe6b6a987d1ffbc46bf4d8961e02ab594f7ca4c1b6b1793812e5e21107f932`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5012 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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