PDF malware analysis — malicious · dc5cb4d25434dae7

MALICIOUS

PDF

12.1 KB

MD5: faae23f5613dede426ffa6de88af743d SHA-1: d963f758bb716d70b92cbbe3c5cfab0df82a0147 SHA-256: dc5cb4d25434dae71684d3c9d962b43aa51f374a877df6025c7a6c10e165f6ce

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, identified by the CVE-2007-5659 heuristic which specifically targets the Collab.collectEmailInfo function. This JavaScript is likely responsible for downloading and executing a second-stage payload, as indicated by the extracted artifact names 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The presence of embedded JavaScript and the specific CVE exploit strongly suggest 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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `55bf607088d84b0da82ddc8720fcf320aca39402a999bb6c6b1fb7c72ed626f2`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5117 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `f8aaf8ca262ed24ec91d2b092941eea83d4c3f9308ca109cadad9a8cd158b090`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12230 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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