PDF / .COM malware analysis — malicious · f87ab35885f8d7b0

MALICIOUS

PDF / .COM

19.1 KB

MD5: 917db581bddebdbbb29a7d67d9c50ca3 SHA-1: fb8d1c13553b8c42f4296c94a2afd70161a722b5 SHA-256: f87ab35885f8d7b0ac450d814b7fcd7aada807f31bbb8aaeffef18a3673a81b4

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability through the Collab.collectEmailInfo method. This exploit is designed to download and execute a second-stage payload. The obfuscated JavaScript and the use of eval() calls are indicative of a malicious dropper attempting to conceal its actions.

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)
eval() call high PDF_EVAL

eval() found — commonly used for obfuscated exploit execution
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 6

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj111711_000.js` `9f66e68e95b9de307ca74bcd80fe61ab5428e0b6e1b58faefef6b6d932356af9`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3837 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111712_001.js` `32443cd4bc2e2de2a0f82105ad7517dbdce690285bd0c37041022351a40d3aa3`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x10C1	13557 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`javascript_obj111713_002.js` `6f1301dac35cd6afe2b6857907ebf8beda6ad80fe0a2e7c087f906e1d52be050`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x45EC	1585 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 5 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `56003a6e1e26dab15c4889fb6a75b427e3d8645d84ec6f5cb8d170c9f5c697d9`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x10C1	1472 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).
`legacy_pdfkit_stage_001.js` `a76ce5bfb27ea4f6a4a5c756282cedc9bfd8893883e620063d7e6366634a7375`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x45EC	86 bytes
`legacy_pdfkit_stage_002.js` `b3924ffdf8c217fef938390c521e5c2714a70bf881fc2336c947bf6a25e10da0`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x10C1	1559 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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