PDF malware analysis — malicious · 39211aa8da7cbeb1

MALICIOUS

PDF

13.0 KB

MD5: 9be016678d4f45d97651781f575de162 SHA-1: e077dae4005a3d78f48e0e2567b9267b00298422 SHA-256: 39211aa8da7cbeb172d07732df60d40ac92ec23d7508e3fe2022f5bafb98d30a

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that exploits CVE-2007-5659, as indicated by the 'Collab.collectEmailInfo' heuristic. The ClamAV detection 'Pdf.Exploit.Agent-36062' further confirms its malicious nature. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are likely responsible for downloading and executing a second-stage payload, although their exact functionality is obscured.

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` `72dc3eb59a7794d7fc8d7273ef9f94424c96ca088908e6af6c18e57f9d8f39e2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12728 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d302c650662ffb7cf1199d8ed69992c2471ced8cc47d875282c55881ddeb2cb3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5255 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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