PDF malware analysis — malicious · 3803a558f4cd3307

MALICIOUS

PDF

12.3 KB

MD5: fc45acba1068362d0f845c7f3b4cbdc8 SHA-1: 225286858054593c5c8fda8f67a8cf441e7c6b21 SHA-256: 3803a558f4cd330726e88f3259877398b0c3590d03c8118f45316406b9f0cfaf

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, specifically targeting the Collab.collectEmailInfo function. Deobfuscated JavaScript files were extracted, indicating a multi-stage execution process. The primary function of the embedded script appears to be the download and execution of further malicious content, as suggested by the extracted filenames and the nature of the exploit.

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` `64b60b058f9ebc4abeb27d5003d6969ebf6afb6876a868fa1d3d803b3cc5a9a5`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12043 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `5465327fddd1a9d035e90b5531a36aac1a3a872aac56f6a178bc75e91ecbc126`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4923 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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