PDF malware analysis — malicious · 20491b4fae426a0e

MALICIOUS

PDF

12.7 KB

MD5: ac023b14964d7ebe5dea1b83edb00489 SHA-1: a8006e892b3e31a473dd9b2b722cd47e9b8e6fa3 SHA-256: 20491b4fae426a0e7ccf5b5472591f74e9da1be9aec0e4bfa7d494392fd81789

78 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File T1071.001 Web Protocols

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo method. This JavaScript is designed to download and execute a secondary payload, indicated by the presence of deobfuscated JavaScript files. The overall goal is likely to compromise the user's system through a multi-stage attack.

Heuristics 4

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)
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` `1847af0a099665b6ac45af66402e56ed64237a1b287618ee3d6643267fda6f35`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	343 bytes
`legacy_pdfkit_stage_000.js` `17008c92f1c424fec4a917c45d85a535c206b95d06fd33b1e7745a602be52856`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	12565 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `806a5c1ff4c599e041eb7ac59f78f562fcd79c95c6ff930e0f964937bca22125`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F0	5138 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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