PDF malware analysis — malicious · d412bc541706093a

MALICIOUS

PDF

11.6 KB

MD5: 042afebed8f5d028e5e1ffc38a8577b0 SHA-1: 2d6c96c46554d0aab949af6491e6ab679fb7ddba SHA-256: d412bc541706093a00002909085fb6247f5618b0939435d3046e725b5030b90e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.002 Malicious Link/URL

This 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 stages, as indicated by the extracted files legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The primary goal is likely to compromise the user's system by running further malicious code.

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` `e31380f4a298efaaa5755531dfd1240af33044d8df55802e785e649d96a98c4c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	11843 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `fff066cfd8567090109e0888892881c162b35f7717993857c7dae09d9f7516bf`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4887 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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