PDF malware analysis — malicious · a44837490dd83ef5

MALICIOUS

PDF

12.9 KB

MD5: dde922f35d16bdae4f7b4f21023a934b SHA-1: ea6fa0ed610a61f28f0148f636678a1cdd073372 SHA-256: a44837490dd83ef51f7d0cdc92fc5c65f712ee47022c63b4f0bac2fb41ebc3da

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically targeting the Collab.collectEmailInfo function. The critical heuristics indicate that this exploit is designed to download and execute further stages, as evidenced by the extraction of deobfuscated JavaScript files. The overall behavior points to a multi-stage attack designed for initial compromise.

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-36064 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36064
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` `a5c8f0f722df4dd9876a0087e1eee65bd3020c5995f94f6729f7e17f3f3677a0`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	331 bytes
`legacy_pdfkit_stage_000.js` `433ed6e9076d2fefe1893b78a9e18256fb50807864267b1efbb9192caafd9aa9`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	12041 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4b5ed86b9022e4aed06f64faa969117c9350a3d68c5fe3082fe4160b0eb31f1a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F2	5008 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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