PDF malware analysis — malicious · b3e57e4a520f6494

MALICIOUS

PDF

11.9 KB

MD5: dbe0367a0ddb9f2ebe658f3d8f4734e0 SHA-1: 9d7f0b9c5e6ccda5c1f0913328d06405cb9bb6a1 SHA-256: b3e57e4a520f64948411441377362f5d06b6e8cb4954be9f0d4a76faad9cca98

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, specifically triggering the CVE-2007-5659 vulnerability via the 'collab.collectEmailInfo' function. This JavaScript is further deobfuscated into two files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The presence of these deobfuscated scripts and the critical heuristic firing strongly suggest that the PDF is designed to exploit this vulnerability to execute arbitrary code, likely for downloading and running a secondary payload.

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` `4690dea35f169e3148b76c824931fc288598d29f5bbd58334195a0f81f2a3b5b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12113 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `f6cc951ce6f4ff595a9d7b5eab8ee506053654cd0f2c94013df61faf10b3866d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5005 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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