PDF malware analysis — malicious · 7a6528b29e7700af

MALICIOUS

PDF

12.1 KB

MD5: 7efc8e369d66ad4080b71e6032b6ae6d SHA-1: 32c96a62e57f7dca9a3b8a5fcd443ad4a49567fa SHA-256: 7a6528b29e7700af4c22756a2b0677ae0cb91ebd5b0382ea9afd3b87cfb72d07

118 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript, identified as a stager for CVE-2007-5659. This JavaScript is heavily obfuscated and uses a hex decoder before execution. The primary function appears to be `collab.collectEmailInfo`, which is a known indicator for this exploit. The script's intent is to download and execute a second-stage payload, although the exact nature of that payload could not be determined from the provided evidence. The high confidence is due to the direct identification of a specific CVE exploit.

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` `79e1243f84a04164ecf17443e1295599e0175018906a278930dd39b3e0d50ade`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5301 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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