PDF malware analysis — malicious · 1db708d0a377eb19

MALICIOUS

PDF

11.5 KB

MD5: f72c12d8c083d4b4f03cfe0c98ed3cd3 SHA-1: 09ef17c533c4897832d5d2f153714fab387c4da1 SHA-256: 1db708d0a377eb19c026812a36d0201d49a5b335d53a9b4726c2f80b518ca1f5

178 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains embedded JavaScript, specifically identified as a hex-encoded stager exploiting CVE-2007-5659 (Collab.collectEmailInfo). This JavaScript is designed to be executed upon opening the PDF, indicating a malicious intent to compromise the user's system. The ClamAV detection further confirms its malicious nature. The extracted JavaScript file, 'annotation_subject_callee_hex_stage_000.js', is the primary artifact of this exploit.

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-36182 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36182
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` `41610c1d21fd4fe29880b2ff28d535accf831823e31fcd3e19f55fc7a8531cde`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	612 bytes
`annotation_subject_callee_hex_stage_000.js` `8fc11de566e596bc7045b1bf216c776b99e9710f423e70ab39c6cc722352aac9`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	4989 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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