PDF malware analysis — malicious · 3d4e27ffebb180d3

MALICIOUS

PDF

21.0 KB

MD5: db8c0dfc9461626be40088c8a42ffebd SHA-1: e3376fc7043fe6971e2c695d29d0a768f6dbaafa SHA-256: 3d4e27ffebb180d3c5fbd3a89ac0ec77b024ed3839a068a4bd2526e7ddbacba7

148 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF sample contains multiple embedded JavaScript streams, with critical heuristics indicating the use of eval() and a specific exploit for CVE-2007-5659 (Collab.collectEmailInfo). The JavaScript is heavily obfuscated using string concatenation and encoding, but the core functionality appears to be the execution of arbitrary code. This is consistent with a PDF-based exploit kit designed to download and execute a secondary payload.

Machine Learning

Nyx PDF Classifier malicious score 1.0000

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` `5ade7ed430626b6dbf0681c4cde35448e4f766d0535ba9636143795e7fbae7c5`	pdf-javascript-stream	PDF /JS object 111711 at offset 0x18E	4114 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_obj111712_001.js` `aee47e25b99258f8979d187afcdc2cf23d51d1a7e25bdb8e1683011f697b115b`	pdf-javascript-stream	PDF /JS object 111712 at offset 0x11D6	15282 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` `4ac2d73c463a919047a279688cf8bc989d5026503aa34ed378cfcf7aa3a3bd6a`	pdf-javascript-stream	PDF /JS object 111713 at offset 0x4DBE	1556 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` `3ce2f209b540fb36eed49cc31ae3f37f7cea4ebc079e3cbb3b999b83a97c1eae`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x11D6	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` `893b6a69a6b1f96ef94da875e2c6de5a6ab10d72b7676187c78f81073910b29c`	deobfuscated-js	multi-marker percent-array decoded JavaScript at offset 0x4DBE	80 bytes
`legacy_pdfkit_stage_002.js` `357b3200f25aaa0f94477e46efe5cd9b025ae985d617a68221987ce815de1da4`	deobfuscated-js	multi-marker percent-array combined decoded JavaScript at offset 0x11D6	1550 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.