PDF malware analysis — malicious · 47d5e438bc345af1

MALICIOUS

PDF

9.6 KB

MD5: 50453ed945110fa44bc59b22655c23d9 SHA-1: 23cbaa1dbe5f9c30304e5b4508bacdd91950be8c SHA-256: 47d5e438bc345af1a555e8139b22b33dd02c7ff321da70ed25ebaadeee1cd039

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The sample is a PDF file that contains embedded JavaScript, which is a common technique for exploiting PDF vulnerabilities. The critical heuristic firing for CVE-2007-5659 indicates the use of the Collab.collectEmailInfo method to achieve code execution. The embedded JavaScript streams, particularly the deobfuscated ones, likely contain further malicious logic, such as downloading and executing additional payloads. The ClamAV detection further supports the malicious nature of the file.

Heuristics 6

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-35905 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35905
unescape() call high PDF_UNESCAPE

unescape() found — often used to decode shellcode in PDF JS exploits (matched inside decoded stream)
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` `d8a6b4ad1abf04d0c4a4f89535cfb57f7312edef25c443f4e844c8ec9d0929dd`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	352 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `c9697029db2ea18c742e713746f5e172e12f84040cf4c82dbf55f78620eeb5fb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12259 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2f7103e7a3bf970170905b31ba5851918459cb2190122ce6a87f989fc93c0c72`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5204 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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