PDF malware analysis — malicious · 3edc4d31ab16e5b3

MALICIOUS

PDF

12.8 KB

MD5: fecc19d0277beaed4d31989a89a988f3 SHA-1: e934f42ae7e26d695cac8a699a4f29413ae6fb2b SHA-256: 3edc4d31ab16e5b38db26ef0d393a401f75c12713810acfa596eb5171e1fb42c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious Link T1059.001 PowerShell T1059.007 JavaScript

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 via the Collab.collectEmailInfo method. The heuristics indicate that this JavaScript is likely used to download and execute a second-stage payload, as suggested by the detection name 'Pdf.Exploit.Agent-36062' and the presence of deobfuscated JavaScript files. The exact nature of the second-stage payload is not discernible from the provided evidence.

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` `787bd8bdc421b9ce24107d866b89b9b3ebf64ecb070d79895b70bf2675e4d520`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12599 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8200abfcf84e29ee0ed5bdfcfd4a55987befa63006829e8cffd365efa15e6a7c`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5197 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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