PDF malware analysis — malicious · 311ff337273675c2

MALICIOUS

PDF

12.6 KB

MD5: afcff955137ca931030030fb8a76c2b0 SHA-1: 69567f49a7395ea4569dd23348e7bd9c40df54e1 SHA-256: 311ff337273675c2958f017a407543f981be2521a7ab2fd3410ad11b4cabbdb5

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates exploitation of a known PDF vulnerability using JavaScript. The ClamAV detection further confirms its malicious nature. The embedded artifacts, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely components of the exploit chain, suggesting the sample attempts to download and execute 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` `9352cf91ba57618619ab58079c59345bedc856610eedbf184068739c56f1ca48`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12303 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `a2f45116e0bb3b230b6f7afacdc6f5399783a13206e1c43e263043f42b4c4015`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5084 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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