PDF malware analysis — malicious · fde4396568f1e994

MALICIOUS

PDF

11.7 KB

MD5: c31e513b3a68d758dd769a050e8ab588 SHA-1: 25605d5b21e01e9e0949d29b99d46fe9253aaf88 SHA-256: fde4396568f1e994278a9abc26980d1645e8900cf29b5a9dc9b131e6d9bb2674

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, specifically targeting the Collab.collectEmailInfo function. Static analysis indicates this JavaScript is obfuscated and likely serves as a dropper for further stages, as evidenced by the extracted files 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The primary intent appears to be the execution of malicious code via a known PDF vulnerability.

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` `df9c830c64eb576806eed1cd413e6e64f3541d7e79ccbd1f706c38992cc1fd71`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	4988 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` `845232775d74e1abec30c5a3b999f30b69db0d9b0252f311940b8a6f88030236`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12049 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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