PDF malware analysis — malicious · 7e86cdb869d75f08

MALICIOUS

PDF

2.0 KB

MD5: 6ce2c8b2cab53d1a510cc600f3fe1718 SHA-1: 56fc0aa71fc0fcd3deb58ffd9d40b7f902f7cf01 SHA-256: 7e86cdb869d75f0872338457e164bb2cb11c471d3967b900a13f2ccdc0870992

218 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

This PDF file contains embedded JavaScript that leverages the 'collab.collectEmailInfo' method to exploit CVE-2007-5659. The JavaScript is obfuscated using 'unescape()' and 'eval()', indicating an attempt to hide malicious code. The primary function appears to be the execution of further malicious code, likely a downloader for a second-stage payload. The presence of multiple heuristic firings related to PDF JavaScript exploitation and the specific CVE detection strongly support this conclusion.

Heuristics 7

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-35930 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-35930
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution (matched inside decoded stream)
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111611_000.js` `f23e505f155bfa9b9f356fa9fddf8d7fcafcc37fc2df3878e575e72c00c819d4`	pdf-javascript-stream	PDF /JS object 111611 at offset 0x6DC	697 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_000.js` `5dd2b817bb866357b034a423db7d2de7eef52a4c9cf1f7fb3ea3c71630b138b1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x189	2652 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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