PDF malware analysis — malicious · 2f1650b0a6767f5f

MALICIOUS

PDF

11.9 KB

MD5: dccad395535501ea4341000880a5da18 SHA-1: ddac275a64c70d9678a3f7ed98dea49b24fb7b93 SHA-256: 2f1650b0a6767f5fbbbf41204d8533c7aa29a823fe8a3fe7771c04db6310b9a1

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 known exploit technique involving the 'Collab.collectEmailInfo' JavaScript function to execute arbitrary code. Deobfuscated JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', were extracted, suggesting a multi-stage attack. The primary function of the embedded script appears to be the download and execution of further malicious content.

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` `74b96dc9bb6d3a5c2b7bbb7b1c4cd999c08f8ee5d5a47be5f64778fb00f91920`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12066 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `5fb1e57078e89a176c9f4f4f43569a87d57c4cf7a5f4623d96d11193dedb0483`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5030 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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