PDF malware analysis — malicious · 98eb40c7b943c865

MALICIOUS

PDF

12.5 KB

MD5: aa8bac0e0f841bde251ea14344e8a3d1 SHA-1: eeb55464a8ee14a66af91120701fd1b5fbe9d3b1 SHA-256: 98eb40c7b943c865f168a05d1f208fb67cbcb2b9b6d799513da0d8a217376f25

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 (Collab.collectEmailInfo). The JavaScript is obfuscated and appears to be designed to download and execute additional malicious content, as indicated by the extracted JS files. The specific exploit and obfuscation techniques suggest a downloader or initial access stage.

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` `310bb792fd520f19cfd56b66f9537fa789dd4728566bb0acdfc664a3cf624c69`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12197 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `390af008f41a405fb9c9c47c4f24782f468364922aa95d08cb3eae413525ae8e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5029 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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