PDF malware analysis — malicious · 49ce5ce482964800

MALICIOUS

PDF

11.9 KB

MD5: b220ae214f63064222e4e96b4ec4a828 SHA-1: db22fa8837b1b5772a60bc0301172166156e0727 SHA-256: 49ce5ce48296480071de53ce6b5decc16e09106b6c65cd5a86320a10894af324

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 the use of a specific exploit targeting the Collab.collectEmailInfo function to execute JavaScript. This JavaScript is further obfuscated and split into multiple files, suggesting a multi-stage download and execution process. The presence of these exploit indicators and the ClamAV detection strongly suggest malicious intent, likely to download and execute a secondary 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` `75377b5bc26348bc31067b7e00e98093fdbefbbbfa9c1c520cd4b7c289f8b348`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12167 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `50f843403f3eb4a9ca0f362f048c0deb2ed86e88970e00dfad8389e9aa578706`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5009 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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