PDF malware analysis — malicious · bed9e665a6311646

MALICIOUS

PDF

12.3 KB

MD5: b69479797cd89007c5d05a1893931005 SHA-1: d978964975747dff5cb76b20b117293284e1cbd9 SHA-256: bed9e665a631164698174784d2ca7117986aff5a5bfdc339513bf67d46a35496

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability through the Collab.collectEmailInfo method. The deobfuscated JavaScript streams, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, indicate the execution of a multi-stage process. This process is designed to download and execute further malicious content, typical of a PDF-based downloader.

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-36062 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36062
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` `068944f8c011a88ab770b45c6de142b9305a1f515d410204d5eadd9ac2b5bfb3`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19B	373 bytes
`legacy_pdfkit_stage_000.js` `e9baf2f4bd56177dce30d5acd5d38b84bfc592898e6cf8e3fddc47c0dd850f35`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12053 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `e31b83413eacc1e9492381f9104d17c96cc93c3bf5efd569e8e8645cef89c72d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5005 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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