PDF malware analysis — malicious · dda9f321bb3f8644

MALICIOUS

PDF

12.3 KB

MD5: 6d23dff03d0bb5dab2c68b090d8c97c0 SHA-1: 77c810625eafb027fe96a6870448e42d913a6b72 SHA-256: dda9f321bb3f86449e5630fb8044b776510583698d06e0f506e571bd269105c1

216 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File Execution: Malicious File T1059.001 Command and Scripting Interpreter: PowerShell

The PDF file contains embedded JavaScript, identified as a stager for CVE-2007-5659. This stager is responsible for decoding and executing further malicious code. The critical heuristic 'CVE_2007_5659: Collab.collectEmailInfo' confirms the exploitation of this vulnerability. The extracted JavaScript, 'annotation_subject_callee_hex_stage_000.js', is heavily obfuscated but is identified as the primary payload delivery mechanism. The file is classified as malicious by ClamAV.

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-36179 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Exploit.Agent-36179
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.
Suspicious extracted artifact high 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.
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.

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0007_000.js` `e89d7054d228dd0d7d4de9a02d1607a443ba297f326673115b5825c1b6cb184a`	pdf-javascript-stream	PDF /JS object 7 at offset 0x1A6	823 bytes
`annotation_subject_callee_hex_stage_000.js` `b6bcf083eaa9dd820446b70832ae66c5a878c4251e8dfdbb22252a919ea06f9e`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x14F	5265 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).

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