PDF malware analysis — malicious · 94a150c46dc55fcb

MALICIOUS

PDF

12.2 KB

MD5: 19a807d0120fb7b94e3593ebef7ee8c2 SHA-1: c4bceceda9bc991b82f3d5ce0c43be820609cc24 SHA-256: 94a150c46dc55fcb03d6caae95dc5017bee36ef027b1d350e9f732ad982aa613

138 Risk Score

Malware Insights

MITRE ATT&CK

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

The PDF file contains embedded JavaScript, identified by heuristics as exploiting CVE-2007-5659 via the Collab.collectEmailInfo method. Deobfuscated JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, were extracted, indicating a multi-stage attack. The primary function of the embedded script appears to be downloading and executing further malicious content.

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: Heuristics.PDF.ObfuscatedNameObject critical CLAMAV_DETECTION

ClamAV detected this file as malware: Heuristics.PDF.ObfuscatedNameObject
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` `6f60a1053baafdc578f85eae84a2dc6d16775fbd66240d82cbfb7b4f4ff4e90a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19D	295 bytes
`legacy_pdfkit_stage_000.js` `ae9e057574428d03475b10e44661a1d5a56484d1516d3a1c5dded2169529bbf8`	deobfuscated-js	z-percent hex-pair decoded JavaScript at offset 0x2E9	5177 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `567a43eac72ab7020fa302a6c314d04af5cbdf438f8fc32ec731a89b8a8d6af8`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2E9	12454 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 1 long base64-like blob(s).

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