PDF malware analysis — malicious · cb3a9bfe338ed6c3

MALICIOUS

PDF

12.2 KB

MD5: dddcb326cc37fc67a15d61f7db6ebdfb SHA-1: 2256beb5aff01cade4c4ed21862ea6aa620d3017 SHA-256: cb3a9bfe338ed6c384e06716b36de0253a0b2a2e1a23144090f2ffc56a8940f0

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, which is triggered by the CVE-2007-5659 exploit targeting the Collab.collectEmailInfo method. This exploit is known to execute arbitrary JavaScript. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for further stages of the attack, potentially downloading and executing additional payloads. The presence of multiple JavaScript streams and the specific CVE exploit indicate a malicious intent to compromise the user's system.

Heuristics 5

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `28b2f1219d871132f9b814b3444a3daca1cc007064ddae3e65ddcae985cb6aea`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12058 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `55ad5a829a1d1f4ee2e708e928f776f3c0582600b9406e3940be97f11bb2a415`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4935 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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