PDF malware analysis — malicious · 8e6ebdbc0a16ef72

MALICIOUS

PDF

9.3 KB

MD5: 2f8e5dd237b61c0923e697a2875892b1 SHA-1: e576713aabbd991248d6ecd2bedd87339450f70f SHA-256: 8e6ebdbc0a16ef721fccb9e93c5d2bd4298aeb1e2c32abde75472f82084c34c8

180 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The critical heuristic firing for CVE-2007-5659 indicates the PDF exploits a known vulnerability using the Collab.collectEmailInfo method to launch embedded JavaScript. This JavaScript is heavily obfuscated but appears designed to download and execute a secondary payload. The presence of multiple JavaScript streams and the ClamAV detection further support this assessment.

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` `94b4df04236691c7d525335a18fb9fb3bab72891227280625a79a50eee725253`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	11891 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` `48b28cc6fbcf7bf46975e9af094faff148362fe016053b9046a5d6e40eda249c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	4977 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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