PDF malware analysis — malicious · 4655efd47ea99af6

MALICIOUS

PDF

12.2 KB

MD5: 29a1f7721198b81e7b44d5436ac82399 SHA-1: 3bd4ccc7930129bfbac5d43ddae132a1a9e8e189 SHA-256: 4655efd47ea99af681a86725e2f1f501680d0514f2ca8fd6f617cb7d437f13eb

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. Critical heuristics indicate the exploitation of CVE-2007-5659 via the Collab.collectEmailInfo function, a known method for executing JavaScript within PDF documents. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for further stages of the attack, such as downloading and executing additional malicious content. The ClamAV detection further confirms the malicious nature of the file.

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` `b2140df5aea6c2f0627f62ea1c09c9fa93e289eaf2e286a7f85a18e860a45a8d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12562 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `de219b1aa0129d4cb3e2970244fa8fd8177afde24eedc5493826fc9a5a373c9d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5182 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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