PDF malware analysis — malicious · 510b4aac8df18f0b

MALICIOUS

PDF

12.4 KB

MD5: 3382464f0e03bd1f25b9e2768c31208f SHA-1: f7b75bd865a6f1ae34913a7fadf235002ed1ce46 SHA-256: 510b4aac8df18f0bd8e94ec131a69012e31a8fb5ac01634bd5bc7a5c8795f6ca

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 flagged as malicious by ClamAV (Pdf.Exploit.Agent-36062). The critical heuristic CVE_2007_5659 indicates the use of a specific exploit targeting the Collab.collectEmailInfo function to execute JavaScript. This JavaScript is likely designed to download and execute a secondary payload, as suggested by the presence of deobfuscated JavaScript files.

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` `3c21c39150a7654a8f1fb6feb4032d33e37edccb1a14fabce843ffd59518a1c3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12168 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `37954208d750bd3264e57788c487e6ea83a1198c1ddf879252213ce8d87c7c9d`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5000 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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