PDF malware analysis — malicious · bfed960ab0e39d17

MALICIOUS

PDF

12.0 KB

MD5: e764cf6d4da1f8bb422707fab5484a7a SHA-1: f0c532013d4cda6e715c6fac511537c781d06ff9 SHA-256: bfed960ab0e39d17bff07c2bb2357f5a4ca643f09748bed0552c8b0ccfafb22c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including PDF_JAVASCRIPT and PDF_JS. The critical CVE_2007_5659 heuristic specifically points to the use of `collab.collectEmailInfo` for JavaScript execution, a known technique for exploiting PDF vulnerabilities. The presence of deobfuscated JavaScript files (`legacy_pdfkit_stage_000.js`, `legacy_pdfkit_stage_001.js`) suggests the script is designed to download and execute a second-stage payload. The ClamAV detection further confirms its malicious nature.

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` `8d050bfad91bed45c8c0cbfd9af55054433df0ee4945bb9d17e4bb5d890b69d9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12239 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `3d945eedb404161838e4ae888ccac589948f058eecfe8bb0c771c5fb6243a4a0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5044 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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