PDF malware analysis — malicious · ec0bb6e69d261a58

MALICIOUS

PDF

12.3 KB

MD5: e15edc8d20b19da472faec2971d37a69 SHA-1: 6d650c523d8de19b6822069151f6558bddc6fbb6 SHA-256: ec0bb6e69d261a586216bafb45cb6a2ebbea799e9060bb7f3c0fc372c69488ea

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

This PDF file exploits the CVE-2007-5659 vulnerability, which involves the Collab.collectEmailInfo JavaScript function. The embedded JavaScript streams, particularly legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are indicative of a multi-stage exploit. The primary function of the embedded scripts is to deobfuscate and execute further malicious code, likely leading to the download and execution of a secondary payload.

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` `149b4e8285b77493df6ae36a4a2cc842c96d1b6b48ca836f26626bce27d9474e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12074 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4c125a047e5f11b85d909515aa45a44dd3c427aea47458843bdd96c2db4667b8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4933 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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