PDF malware analysis — malicious · 4e9a84fd787253f9

MALICIOUS

PDF

11.8 KB

MD5: 6bcadb1229e455fa22ec7e904d025684 SHA-1: 7c3e07978cf13db483fe7c89417c03c998d180be SHA-256: 4e9a84fd787253f940265f8006325b4acf690ca8affdbd4b0a727d0fc4f7b9e2

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.002 Malicious File

The PDF file contains a critical heuristic firing for CVE-2007-5659, indicating the exploitation of a vulnerability related to the `Collab.collectEmailInfo` function. This vulnerability is used to execute a hex-decoded JavaScript stager, which is recovered and deobfuscated. The stager is designed to download and execute a second-stage payload. The presence of embedded JavaScript and the specific CVE exploit strongly suggest a malicious intent to compromise the user's system.

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` `fcf4ce447e028e61d94612c00da2fdcfcd7dd1d5aeb830bfe6eba3640667b8e1`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5203 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.