PDF malware analysis — malicious · 4743b97e8dd093fb

MALICIOUS

PDF

12.3 KB

MD5: e7ce0b7e50f1ca0c86f1e38fe5acd4f4 SHA-1: 8e4b20c245492c68f98c1e07221caab05282ac0f SHA-256: 4743b97e8dd093fb628df0a09c170411b2c12b7dfc32cce491a612deb5be2e49

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript/JScript

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2007-5659, indicating an exploit attempt. The embedded JavaScript streams, particularly 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', are likely responsible for downloading and executing a secondary payload. The ClamAV detection 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` `0e76709ee539fa2f3da49e2d75c4308e32fda81bcbf1a9cd9276ed3452caf409`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	11911 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ca5f55c983c70f9a43b00b5e625f6432ba86bb2fdf0023256ea6ac8ce79e3413`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4898 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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