PDF malware analysis — malicious · 2d32f5ec336b389a

MALICIOUS

PDF

12.5 KB

MD5: 11b2641ef640bcb324b883240c9657ab SHA-1: d5737cab1c14f15bb2ed3f758c01b415babf00d4 SHA-256: 2d32f5ec336b389ab020695152462a941ebd0d58c59779b8f5e07f1b49572bcf

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability, specifically using the Collab.collectEmailInfo method. This JavaScript is further obfuscated and split into multiple streams, indicating an attempt to conceal its malicious actions. The critical heuristics and ClamAV detection strongly suggest this is a malicious PDF designed to exploit this known vulnerability, likely to download and execute a secondary payload. The extracted filenames 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js' further support this, pointing to a multi-stage exploit kit.

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` `7c4df6af114a0a9ba0e5438886a22083bc57da28229c70edc0b08ddd13b854f3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12232 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `8793bda525085a50e18608fc23c25b8834a9276db6c87bdafe846908d28bd71e`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5083 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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