PDF malware analysis — malicious · 42982a6674a8a537

MALICIOUS

PDF

12.5 KB

MD5: c8d8ca75a51f81324e106ef988fb9d38 SHA-1: 9d4265fd8c9e99bdac28626bd1971dc61f747f19 SHA-256: 42982a6674a8a5372a126c4bea7a1c516388e2145d3773f259fe03864746b4f7

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.002 Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV and exhibiting characteristics of exploit kits. Specifically, the CVE-2007-5659 heuristic indicates the use of a JavaScript exploit targeting the `Collab.collectEmailInfo` method. The deobfuscated JavaScript files suggest the execution of further malicious code, likely a downloader for a second-stage payload.

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` `646b009594961dc9721c26ac7bd00893d0b4e53cc6ec596227793dcc50833615`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12188 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `2e79c75e2cb33f499b88c246032b7002335ace74796dc6d2f22a99498cccfb6f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5045 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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