PDF malware analysis — malicious · 4fb35e84fa5bcf26

MALICIOUS

PDF

11.7 KB

MD5: 2764cb177da865907abf69b03c80d39d SHA-1: 6a3364d3c3d4ed39a488bee8922737f0592ace39 SHA-256: 4fb35e84fa5bcf26b87df376269c84b842af98e7319d3a300192c3b3af8d4e30

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.002 Malicious Link

The PDF file contains embedded JavaScript, identified by the PDF_JAVASCRIPT and PDF_JS heuristics. The critical CVE_2007_5659 heuristic indicates the exploitation of a known vulnerability (Collab.collectEmailInfo) to execute a JavaScript stager. This stager, named 'annotation_subject_callee_hex_stage_000.js' in the extracted artifacts, is responsible for downloading and executing a secondary payload, as suggested by its nature as a stager and the ClamAV detection of Pdf.Exploit.Agent-36180.

Heuristics 6

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-36180 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36180
Annotation subject callee-key hex JavaScript stager high PDF_ANNOT_SUBJECT_CALLEE_HEX_STAGER

PDF JavaScript uses syncAnnotScan()/getAnnots() to read an indirect annotation /Subject stream, percent-decodes it through marker replacement, then uses a callee.toString()-derived key to decode and eval the final 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.
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_obj0007_000.js` `17e11d5c0e7abf0d400044cf4333a75f193b35e2745d65fea155eb4de3ce3aa6`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	628 bytes
`annotation_subject_callee_hex_stage_000.js` `aabd07aaa5e98d05026946f14947ff6877949138b9c220cc515964600c4b5e18`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5122 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.