PDF malware analysis — malicious · de1b75fcd4b6483e

MALICIOUS

PDF

11.8 KB

MD5: bdb5b18ecc6fab33d95c5fbde97ad956 SHA-1: 5cffbe3c9295db3a1ec50d4f8d72642728fab404 SHA-256: de1b75fcd4b6483edd64cbf707542d98737d4d33f4ac01d73d3fba241e308ef0

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates exploitation of a known PDF vulnerability using JavaScript. The embedded artifacts 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' are deobfuscated JavaScript files, suggesting they are part of the exploit chain. The ClamAV detection further confirms its malicious nature. The script's likely intent is to download and execute a second-stage payload.

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-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `6953d029c9fd4c9f3254419ac0f9b30c0c33528391239cfde991e7ba367c3be8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12064 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `816880fa063778a62a30116c39b775fc859a7af038bef662eaee00cfd220b0a1`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4940 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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