PDF malware analysis — malicious · efe842c31fbc9c69

MALICIOUS

PDF

11.7 KB

MD5: 16b2b4b82f4e9e2f40076cea025edddc SHA-1: 2d1ac324890032a2793074f0172852cdb9fd8a1d SHA-256: efe842c31fbc9c69ca9dc8ccdea3d9ba6731096ac9b31894be7cda630f2b7c5c

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 the exploitation of a known PDF vulnerability using JavaScript that is constructed by concatenating info fields. The embedded JavaScript streams, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for executing the exploit and downloading further malicious content. ClamAV also detected this as Pdf.Exploit.Agent-36065.

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-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `1f8494aaeb52c159ed7a8176713cf25eee1ff9e234414d80bbc7f4e264307fde`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12081 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `6cbd73c8597042ed54666bb6f6b14b6aac025e5b67e26be268780b0c7a336d88`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	4893 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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