PDF malware analysis — malicious · 77e3dd1af7fa53a0

MALICIOUS

PDF

12.7 KB

MD5: ce76a77f238c6747ae5c7d6ea6c1eb88 SHA-1: b74dae272c21d5f26b879f4b6a31f75f8d73151e SHA-256: 77e3dd1af7fa53a0841a59a739dcdc8ed774e9af63a9ed4156462ec3b95d6765

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/Shell Script Execution T1204.001 Malicious Link/URL

This PDF file exploits CVE-2007-5659 using embedded JavaScript. The heuristics indicate that the JavaScript is obfuscated and likely concatenates strings to form a malicious payload. The extracted JavaScript files, 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js', suggest a multi-stage infection process. The primary goal appears to be the execution of a secondary payload, typical of a downloader or initial access exploit.

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` `b1a32eee8a61ce25fc68e33f81b300f1b41c5c96aff430ccfa07b9dd78e48c71`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12390 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `27072200a468e3b0fcf158420811aebb584b7a2546d9e05b526ec5192c3c2eca`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5125 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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