PDF malware analysis — malicious · 53fc117e59e41122

MALICIOUS

PDF

12.4 KB

MD5: e8ccc1daefdf580f87c5326a6f7d11ab SHA-1: bedb4e8a65a060a75bf16dc448ae4e715817fd72 SHA-256: 53fc117e59e41122ba0675b7ec29f81d9e88805254100b54b4d82057884ec9e7

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/Object

This PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript is designed to be executed upon opening the PDF, likely to download and execute a secondary payload. The presence of deobfuscated JavaScript files further supports this attack vector.

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` `bf173e8c3d8698d6433436790d9e1d8d708d2c3f043b22da9e4cfc9720f80deb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12017 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `32a56d433b6a0ea830cb7eaf24409fb13c17cbeadfc4867c6d09bafbdb4328eb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	4982 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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