PDF malware analysis — malicious · 98270b1aad309b89

MALICIOUS

PDF

12.1 KB

MD5: f950e6ca34d7a5b635601e5cb7739ff9 SHA-1: a342d793bfe50204fc6c43932bcb6188eacba7d3 SHA-256: 98270b1aad309b8983f7a4a99ce4408162348d5582339b745fcfa00efc67fa4a

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 method to execute JavaScript. This JavaScript is likely responsible for downloading and executing a secondary payload, as suggested by the extracted files legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. 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` `81d5aaee4b4952b3b52d96e2aba17615c3f9ce4fbc93b01e9e0fc0e172fe0e80`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12360 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `847bf00adaeba52f6add0be92fde01e4406c9d79949d760ae263ad797a98c35b`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5120 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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