PDF malware analysis — malicious · 3142703d7e11ac4a

MALICIOUS

PDF

12.7 KB

MD5: af8c6220ffef6897de4dd870c563b082 SHA-1: c8a9853f2d16d5e7479ddc099a669f8b8650d573 SHA-256: 3142703d7e11ac4acbb5766bbf4460273ad090b0f563ab929b945abca10a1f21

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 use of a known exploit targeting the Collab.collectEmailInfo function, which is used to launch JavaScript. This JavaScript is likely responsible for downloading and executing a secondary payload, as suggested by the suspicious extracted artifacts named legacy_pdfkit_stage_000.js and legacy_pdfkit_stage_001.js. The ClamAV detection further confirms 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-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` `555a74cbb4264fe6859c46101f314ef2fbfc3362e1e56c071024f1ef4c14a0b2`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12377 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `61b7dc55ac78351585f45d121b14281ff158317bbc9bb742984fd9f6644f0ae3`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5182 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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