PDF malware analysis — malicious · e05439e2379d6008

MALICIOUS

PDF

12.8 KB

MD5: 9b33ca83b315d6e72d4d30b76b00a343 SHA-1: d0a55ba5ff35cc9d5e4e74ae6c57eb9f8131ba9c SHA-256: e05439e2379d6008fdda9ef60a151f925cf8ca5eeae47746ba97ea736034277c

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. A critical heuristic, CVE_2007_5659, indicates the exploitation of a vulnerability using Collab.collectEmailInfo to execute JavaScript. This JavaScript is likely responsible for downloading and executing a second-stage payload, as suggested by the presence of deobfuscated JavaScript files named 'legacy_pdfkit_stage_000.js' and 'legacy_pdfkit_stage_001.js'. The ClamAV detection further supports its malicious nature.

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` `1ab56336fb2504eb528750c8f67379c03106094576ae9d4a40fc6ebce63fae70`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12540 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `ea0db73af2eb7f84464e110bf3b23e1d3cef98d2d1f131b3eb386c85b6af22ed`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5197 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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