PDF malware analysis — malicious · e40994015d6bc194

MALICIOUS

PDF

11.4 KB

MD5: 386981c47d58c42dd66b5051baee0ad3 SHA-1: d047beb7874c4b1590f39f676ad0282a758e70c1 SHA-256: e40994015d6bc194abc8d994bb442522a24275c27f253534b9b9f44cb048e60e

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The file is a PDF containing embedded JavaScript, identified by multiple heuristics including CVE-2007-5659 which specifically targets the 'Collab.collectEmailInfo' method for JavaScript execution. The embedded JavaScript streams were deobfuscated into 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. This suggests the PDF is designed to exploit a vulnerability to run malicious code, likely for downloading and executing further stages of malware. The ClamAV detection 'Pdf.Exploit.Agent-36065' further corroborates its malicious nature.

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` `204e85ab6f9a8a7b7b58f895011c35966254b81c85fed4484df24a4b021cce4a`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11775 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `c5504843e362363816c123862f9e4e9289cbcfe60648958dcda08e1f121d89cf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4815 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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