PDF malware analysis — malicious · 842cde45d75f024f

MALICIOUS

PDF

11.8 KB

MD5: 4b1c5b433882185067e5d123eba95155 SHA-1: 64f42cdfe01085470ff06789e479f01b41cce6ca SHA-256: 842cde45d75f024f57a5c087759cb1f60af40ecbeb631c5925d0e2c2f16ebb45

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified by the 'PDF_JAVASCRIPT' and 'PDF_JS' heuristics. The 'CVE_2007_5659' heuristic specifically indicates the use of the Collab.collectEmailInfo method to execute a JavaScript stager. This stager, recovered as 'annotation_subject_callee_hex_stage_000.js', is likely designed to download and execute a further payload, contributing to the malicious nature of the document.

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)
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` `83c89bafa116d9c91eff0b9ebda502f5bf0baa04c36fa774c6ebc2756ba3479f`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	585 bytes
`annotation_subject_callee_hex_stage_000.js` `d90ceca43ff81ff9e53eeadaa4c1575cc283372f4b86d66bc9725e625743334b`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5367 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.