PDF malware analysis — malicious · ca6675e6d042e8a6

MALICIOUS

PDF

9.8 KB

MD5: 8d3c1401a4f3e3ae9db03821dc05e8f6 SHA-1: 7cd85c6f1a6d64579c32c72c9eca65e6548f9de6 SHA-256: ca6675e6d042e8a627ae92e4b592baa8d9e099f4548ed65fd1d43a95391631ea

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript is heavily obfuscated and decoded using unescape(), indicating an attempt to hide malicious code. The ClamAV detection of 'Pdf.Exploit.Agent-35905' further confirms its malicious nature. The primary attack vector appears to be exploiting this known PDF vulnerability to execute arbitrary code, likely for downloading and executing further stages of malware.

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` `5f537dab654d43e19e1c9caf2d5bd9e2be30d5f5df24e2b36bffe32b4e8fb659`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12645 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` `6424fbd4643a2788470713a6c9a9d4dcf5367814ee3a5fd78e0e2173aadaa17f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5357 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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