PDF malware analysis — malicious · 2e74ac4f4071af23

MALICIOUS

PDF

11.8 KB

MD5: da5e761c3a57285690a6390d716580f2 SHA-1: b35ddd7b2e2e77d3b46a8267a296dbfadbf9d803 SHA-256: 2e74ac4f4071af237177d508fc4a45c091d4190630f45e2ab4a1175c01287aa4

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The critical heuristic CVE_2007_5659 indicates the exploitation of a known vulnerability in Adobe Reader via the 'collab.collectEmailInfo' JavaScript function. This function is used to execute embedded JavaScript streams, as confirmed by the PDF_JAVASCRIPT and PDF_JS heuristics. The extracted JavaScript files, legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js, are likely responsible for downloading and executing a second-stage payload. The ClamAV detection further supports the malicious nature of the file.

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` `51c381a164a173c8fb526d68732652cef93e14c224d5abbcea5dc48667dd5792`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12266 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `d4f1d91e711b9f576f666e216ca30afd7e236201cfd27dd2ce1460ce46e0e6ae`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5019 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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