PDF malware analysis — malicious · 4ceac21bcb293a47

MALICIOUS

PDF

13.0 KB

MD5: a14352daf35666dcbf6be1a63d58af98 SHA-1: 2d846b13a65f26c5024b6ad51ead2342c16bc480 SHA-256: 4ceac21bcb293a47162e473b907023c4579444f42529c18798553bd4a56bc08e

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that exploits CVE-2007-5659 using the 'collab.collectEmailInfo' method. This JavaScript is further deobfuscated into two separate files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The primary function of the embedded script appears to be downloading and executing a second-stage payload, as indicated by the heuristic firings and the nature of the deobfuscated JavaScript. The file is detected by ClamAV 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` `e9fc71662520348ea0c340f12cfc4800162f9735d3e48bcf50d03ddfe20422a0`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12794 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `4dd33100fd4e43dd96757aff3640d6a63b14799e029028cc9e2722e771867823`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5325 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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