PDF malware analysis — malicious · 1e85e16bf5fb008f

MALICIOUS

PDF

12.5 KB

MD5: 2a332ec0255179a519af2410fb86d980 SHA-1: 8d55e3b91025ca8acf487e6d044c3042b4ac7df6 SHA-256: 1e85e16bf5fb008f0ae8eeca60445dbce039a2b5959808b2fca8e7f932c4d402

138 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File: Malicious File

The file is a PDF containing embedded JavaScript, identified as malicious by ClamAV (Pdf.Exploit.Agent-36062). The critical heuristic CVE_2007_5659 indicates the exploitation of a vulnerability related to `Collab.collectEmailInfo` to execute JavaScript. The extracted JavaScript files, `legacy_pdfkit_stage_000.js` and `legacy_pdfkit_stage_001.js`, are likely responsible for downloading and executing a secondary payload, a common technique for this type of exploit.

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` `c0f171f937593e2a90e38f05ef9da5f24c92b2f5ecf42a32f62312c95da09893`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	12125 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `3a9bf6282ece232dac612cee94285120c7df78087003ef252d9adf2a7cce0e6f`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x2F5	5050 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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