PDF malware analysis — malicious · 7d0bcd8709f2c1ae

MALICIOUS

PDF

21.1 KB

MD5: 925aebb0342821170e060e4316433a7b SHA-1: 772ebf1addd6a4f4f79918a0e6590c46b76c57f2 SHA-256: 7d0bcd8709f2c1aed6c627496ab5b542fe77a8e9d750041b8dd709e590df74ea

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1059.007 JavaScript

The PDF file contains embedded JavaScript that leverages the CVE-2007-5659 vulnerability (Collab.collectEmailInfo). The JavaScript is heavily obfuscated but appears to be designed to download and execute a second-stage payload. The use of eval() and unescape() functions, along with string concatenation to hide malicious code, is characteristic of exploit kits attempting to bypass detection. The extracted JavaScript streams and deobfuscated files confirm the presence of exploit code.

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` `2b85467c37f1b3989797be83b131330beec64f060aada1002cf5ab5f3da93adc`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	3128 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` `614078d4db662398d8eb36d6412236f4e3959fa630f609191019f030eef0acf9`	pdf-javascript-stream	PDF /JS object 111712 at offset 0xDFC	16360 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_obj111713_002.js` `2810ff4c38e0e89642d66db5501ef248a7392de27ad00f2203c34a40d9a1cadc`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4E1A	1514 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` `3d262e9b2231d9eeca68d7b0f18e2d2862f73023d7b22655cf3823e2b5c307aa`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0xDFC	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` `893b6a69a6b1f96ef94da875e2c6de5a6ab10d72b7676187c78f81073910b29c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4E1A	80 bytes
`legacy_pdfkit_stage_002.js` `b264b7176a6472537fc726515b7043b57ca33b4f321c709f2629bb5561f59005`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0xDFC	1558 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s).

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