PDF malware analysis — malicious · 21131096431ad9ba

MALICIOUS

PDF

12.2 KB

MD5: f21de2aae593170870449b5d15d6cc22 SHA-1: 521805988413446c9f0c64c01563b6d6aa355e94 SHA-256: 21131096431ad9baf8c341d48fe131f3f0eb107514ec89d5ff5e2a8ee42c32d3

138 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious File

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the use of a known vulnerability related to the 'Collab.collectEmailInfo' JavaScript function, which is used to launch further malicious code. The presence of deobfuscated JavaScript files suggests a multi-stage attack, common in PDF-based exploits. The primary function of the embedded script appears to be the exploitation of this CVE to download and execute a secondary payload.

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)
ClamAV: Pdf.Exploit.Agent-36065 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36065
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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `9c67560e8c63b720885d3efc1627b844b86a6ec08e99e5b65a22eae832045756`	pdf-javascript-stream	PDF /JS object 7 at offset 0x19C	431 bytes
`legacy_pdfkit_stage_000.js` `36c929b8c9bd0368e79b68136f5ef98fc9e9e39b1ae8693e5713d4ca2987b012`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	12581 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`legacy_pdfkit_stage_001.js` `b6b7fa5916973486fe83ada9416e44e81f4e3a0851c9dc48962b3ec7ce03ecfb`	deobfuscated-js	repeated-marker hex decoded JavaScript at offset 0x315	5179 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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