PDF malware analysis — malicious · 9db927c120965ec8

MALICIOUS

PDF

11.7 KB

MD5: 09d8ad018681e4c48388a4285edae188 SHA-1: fb663cbef13c83e4baa81e7175a1ff47691dccdc SHA-256: 9db927c120965ec82973242cb5665c7894b3b2a4a7806c6f919875eb267ad936

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of a known exploit targeting Adobe Reader, specifically related to the 'Collab.collectEmailInfo' function. The embedded JavaScript, particularly the deobfuscated files legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, likely serves to download and execute a second-stage payload. The ClamAV detection for 'Heuristics.PDF.ObfuscatedNameObject' further supports the malicious nature of the file.

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` `949b92e9905bf1cc64306ee28a03a501818ee28be9b2c682e1649feef3007028`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	4990 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` `d08e513dd8380b2d630d08c39ed80cacdcff3c3aabacb8d2f5d74862516203fe`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	11965 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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