PDF malware analysis — malicious · 2741a7ea0a3eb89f

MALICIOUS

PDF

23.1 KB

MD5: 004b4dfe9f3ec6b297f6872374ca027c SHA-1: 07603708bc01acf1da80929f32f7ff6896ed22aa SHA-256: 2741a7ea0a3eb89fea2d0c1779f2dfad371218438f71d13b9de58f629d0de231

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains obfuscated JavaScript, triggered by the CVE-2007-5659 vulnerability via the Collab.collectEmailInfo() function. The JavaScript utilizes eval(), unescape(), and String() functions, indicating an attempt to download and execute a second-stage payload. The complexity and obfuscation suggest a malicious intent, likely for further system compromise.

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` `c0d7f81a96e3751f7731cf6e221d5d4140841db5b56d146641a74abe8b819d60`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	4197 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).
`javascript_obj111712_001.js` `dfcd8703cfa19b39be63eac49eee84915cf0138beba1af6f022082955f420196`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x1229	17439 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` `41fc744429af3194d8c6bd4123139d66288b81f589d0f2081b3a03467fb0bf50`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x567E	1445 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` `c31c7b61a05c0a9430657b6174280228e4d00488dbfd8ac2e625349b38ee873b`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x1229	1477 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` `9c5a582589f4f495afed4143bf30536e7cba31131633699c6b3895004bd77099`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x567E	82 bytes
`legacy_pdfkit_stage_002.js` `244f299135117e37cb9984112698f61d6e8e42fa236da09351abdd197413eaab`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x1229	1560 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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