PDF malware analysis — malicious · b2107bdd236c9125

MALICIOUS

PDF

11.7 KB

MD5: 8af599bba378caa6ba98d50a9b650a1e SHA-1: e1c7724e5c46d94959e89630dfcf880ebef608e7 SHA-256: b2107bdd236c9125049dd8ea95efb4d818076fc75c295656a4ae59812d4666df

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript/JScript T1204.001 Malicious Link/URL

The PDF file contains embedded JavaScript, identified as a stager. This stager is obfuscated using a hex decoder keyed by callee.toString(), a technique associated with exploiting CVE-2007-5659 (Collab.collectEmailInfo). The script's primary function is to decode and execute further malicious code, likely leading to a second-stage payload download or execution. The high-confidence heuristic for CVE-2007-5659 strongly indicates this exploit vector.

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` `0df291d69669aabea8d48539ff6e3447b14e49a861871000e6476334f075bd19`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	1011 bytes
`annotation_subject_callee_hex_stage_000.js` `d407000531a47475829da2d639522ca98c8c4fbd3bd09e06a204effd98705082`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5018 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.