PDF malware analysis — malicious · 3e2c1fa02768c93f

MALICIOUS

PDF

75.9 KB

MD5: bcab8fabf3a93976fc9b1a9281a40277 SHA-1: c3c0aa4ceb2e9c1a290534f3371693116abb8d48 SHA-256: 3e2c1fa02768c93f3e6504ec94aa3179c250ebfbbf3ad2b2dede87f0fa553f79

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1071.001 Web Protocols

The PDF document contains embedded JavaScript that utilizes a binary-XOR stager. This stager is designed to decode and execute a further stage of JavaScript, exploiting CVE-2007-5659 through the Collab.collectEmailInfo method. The recovered JavaScript is heavily obfuscated, but the critical heuristic confirms the exploit's intent to download and execute a second-stage payload. No specific family could be identified due to the generic nature of the exploit and obfuscation.

Heuristics 7

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
Binary-XOR JavaScript stager high PDF_BINARY_XOR_JS_STAGER

PDF JavaScript stores viewer-version payload branches as long binary digit strings, XORs each bit pair, converts 8-bit chunks with String.fromCharCode, and evals the recovered exploit stage.
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.
String.fromCharCode low PDF_FROMCHARCODE

String.fromCharCode found — used to construct payload strings dynamically. Common in benign JavaScript libraries for codepoint manipulation, so this alone is informational; weaponised use is also caught by the dedicated fromCharCode-stage and exploit-shape 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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0004_000.js` `15d5750a2e28129495e30fa46d13f60c876cfe6fa3a2dc5011201816883fccd3`	pdf-javascript-stream	PDF /JS object 4 at offset 0xC0	77434 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 3 eval/decoder/string-building token(s). Carved artifact contains 6 long base64-like blob(s).
`binary_xor_stage_000.js` `9b8bf8faee4032959cdc3c8d0a9f27f55db87b93175e9dc2f097c51a7c5062d2`	deobfuscated-js	binary-XOR decoded JavaScript at offset 0x3D7	1267 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.