PDF malware analysis — malicious · 56cef45d906f5878

MALICIOUS

PDF

12.9 KB

MD5: edfed10d26747456f84c45d9ca58b256 SHA-1: 5ca1a58929933e31bb4d60ab96076de1354e5b00 SHA-256: 56cef45d906f587813b432861921d36c2de5dc1f09fcce652bfb62d676b8d1cd

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 via the Collab.collectEmailInfo method. This JavaScript is designed to download and execute a second-stage payload, as indicated by the presence of deobfuscated JavaScript files. The ClamAV detection name 'Pdf.Exploit.Agent-36062' further confirms 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-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` `117120c825cc51ec6e6eb12ccc1a1563a7f2fed37a762dbb537ccfa9cfd37701`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12573 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `bf0d64d1c6032bd2735d2af695bd5a7ac656b9d3a785de68e2cae2bd6b63aab3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5192 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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