PDF malware analysis — malicious · dcabcb41cb5524cd

MALICIOUS

PDF

22.8 KB

MD5: b085da571729993adc08f828017842a6 SHA-1: f65a972935a78234131f6e7e59f61f023f60dd49 SHA-256: dcabcb41cb5524cd938a00a1a146553c472cc1842ba4a4358e8139e5ad0c57a9

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript is designed to be executed upon opening the PDF, and its primary function appears to be downloading and executing a secondary payload from a remote source. The extensive use of eval() and unescape() functions, along with string concatenation, indicates a deliberate attempt to hide the malicious code's true nature. The extracted JavaScript streams and the heuristic firings strongly suggest this exploit is intended to compromise the user's system.

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` `b080002696ead07aa19784ce339b245370b8b96e900df20fee90800d3cc552fe`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3598 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` `90807d93b9f490671c904a1b36c11beefd8276d6fe1ac0a71c4b906742f67124`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xFD2	17448 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 4 long base64-like blob(s).
`javascript_obj111713_002.js` `eeb559e75e6b8b193f68392f31f229e005cbdbcf7bf2614e5409d97eacda8b3c`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x5430	1663 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`legacy_pdfkit_stage_000.js` `fd4a573f8560b7665161d76243aa155e46796fd509911599815e749e3c71df64`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xFD2	1469 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` `3d722149c3f1d5dfd316ac6e0fe38ba1894f3b68856743a57c4905c91a42b560`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x5430	85 bytes
`legacy_pdfkit_stage_002.js` `6d531e95cd4d6634c5be8ecd15a98fc59c949a54020181b4fc5cb591aa816310`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xFD2	1555 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

Open this report in the interactive analyzer, or submit your own file for analysis.