PDF malware analysis — malicious · 31179bb28b367cdd

MALICIOUS

PDF

12.0 KB

MD5: 17649c0c94834a77bfc9ff1a07b4b14b SHA-1: b9374996ac0e70b862ed6f5fdd3fa70f94366b16 SHA-256: 31179bb28b367cdd5b1710d410ec434a094a107a8b1f2c80b47d6459fe0c190b

118 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-stager exploiting CVE-2007-5659. This script is designed to decode and execute further malicious code. The presence of this exploit and the deobfuscated JavaScript strongly indicates an attempt to compromise the user's system, likely through a downloader or dropper mechanism.

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` `6dc84d60cd1bb1830770300ff5b83331ac18d9b8f865aa408731ce32e2c4dd95`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5267 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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