PDF malware analysis — malicious · 3c9f11f651f003ac

MALICIOUS

PDF

9.5 KB

MD5: dad1946742f93429afa2d353f987c0ed SHA-1: 427ff1eacf323bc8c8a63f90f5f35ef1963e1b83 SHA-256: 3c9f11f651f003ac479fc685b4d69e72d0976ca11386fd33846b28aff16776ee

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

The file is a PDF containing embedded JavaScript, which is flagged by multiple heuristics including CVE-2007-5659. The JavaScript is obfuscated but appears to leverage the 'unescape()' function and the 'collab.collectEmailInfo' method, indicating an exploit attempt. The primary attack vector is likely the exploitation of a known PDF vulnerability to achieve arbitrary code execution.

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` `ba3fdb1b698c9b35d2f105fa6c29038a20f2900f8e9e3076ce9189743447d763`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	12145 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` `ad0fc87098874507421c45341d287c426719d3e379fe5e4044626889021168be`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2FE	5081 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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