PDF malware analysis — malicious · b71a36396ebd9e3a

MALICIOUS

PDF

11.7 KB

MD5: d60470dc961714ac3e1f14f4e1cd2ada SHA-1: 6ffa52982af6cd3484e8cafd97e77f67d25f3e57 SHA-256: b71a36396ebd9e3a702d5942883bc6c1c13837c70a1697d429fefce44b2a5ce8

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 that leverages the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. This exploit is designed to execute arbitrary JavaScript, which in turn is used to deobfuscate and likely execute further malicious code from embedded JS streams. The presence of 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' indicates a multi-stage attack, common for downloading and executing additional payloads.

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` `43f78b165e67f28b463df118ba1e1f3df4d11fedddf2bc1947668249d40bb35d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11919 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a6e0b392c5bbb8451e6a78cbb503bb778a60d18fbf2855ef11385870a9c3627f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4901 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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