PDF malware analysis — malicious · e11aeb4f5ba948f2

MALICIOUS

PDF

12.4 KB

MD5: c48d8ce7c5af4c1c2ce0be635a28e6cb SHA-1: 261d202ad1b80931e8acd66bafe28b87bd80fdfa SHA-256: e11aeb4f5ba948f2d2ce660c9838a0c6121374bbeacf3736f828394a1d7a5cfe

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The file is a PDF containing embedded JavaScript, which is known to exploit CVE-2007-5659 via the Collab.collectEmailInfo method. The heuristics indicate that the JavaScript is obfuscated and likely serves as a downloader for further malicious stages, as suggested by the extracted filenames 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. ClamAV also identified this as Pdf.Exploit.Agent-36062.

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` `369c8cf59596df6aea603c9758fe7c89b6b08a0750a5bfef6ac7ceebcbc3992f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12118 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `cd525bac79e2b5da190cb39674e08646102b832c3d613f85aefb6039f6efc0e2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4949 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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