PDF malware analysis — malicious · 8c1d82f700837792

MALICIOUS

PDF

11.7 KB

MD5: 37219862ddf0388d86605dfbf264da5a SHA-1: eae7855ba6811092a2edbdc6e6ff1ff7f0eb844a SHA-256: 8c1d82f700837792a234169be679b8edfcc4eddb740ee6d5b50b84b07b9606dd

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link 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 vulnerability (Collab.collectEmailInfo) which involves JavaScript execution. The extracted JavaScript files (legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js) suggest a multi-stage process, common for downloading and executing further malicious content. 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` `ae65880ddfd81a9df501cda7a43ed60b82ef8a44dfaa3310c2371b3ded036909`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11855 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e575245ee2241fdd1e0b9f9b03e442b60a85122f4845d4f89471cbdd14c4f126`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4942 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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