PDF malware analysis — malicious · 801062d528882b86

MALICIOUS

PDF

45.4 KB

MD5: 46e50e6f2ad1db7478efcdbd99487a9d SHA-1: 024296366f36ec8df12f17ef9347aafaa95c89fb SHA-256: 801062d528882b865c8623d0d9def040c023cc963959ac201b68b2b9d01be33e

166 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 JavaScript T1204.001 Malicious Link T1071.001 Web Protocols

The PDF file contains embedded JavaScript that is triggered by a CVE-2007-5659 exploit targeting Adobe Reader's 3D content parsing. The primary JavaScript stager, 'annotation_subject_callee_hex_stage_000.js', is responsible for decoding and executing further malicious code. This code likely downloads and executes a second-stage payload, indicated by the presence of multiple JavaScript streams and a U3D file. The high-entropy and obfuscated nature of the extracted scripts suggest a downloader or dropper functionality.

Heuristics 7

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)
U3D/3D content in PDF — Adobe Reader 3D parser CVE-family indicator high CVE related PDF_U3D_CVE_RELATED

PDF contains U3D (Universal 3D) or 3D annotation content — CVE-2011-2462 and CVE-2009-3953 are critical vulnerabilities in Adobe Reader's U3D processing that allow arbitrary code execution. U3D content in PDFs is extremely rare in normal documents.
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.
syncAnnotScan annotation-staging primitive low PDF_FOXIT_SYNCANNOTSCAN

PDF JavaScript calls syncAnnotScan() — a no-op annotation-enumeration primitive used by exploit-kit JavaScript to stage payload reads from annotation /Subject fields before eval(). Not a vulnerable sink itself; rarely seen in legitimate PDFs. (matched in decompressed stream)
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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0009_000.js` `f6cfd7e0d7b6d48fa98774e01bd7c172232669e5a6080722adf7a5753a6eec07`	pdf-javascript-stream	PDF /JS object 9 at offset 0x4738	441 bytes
`annotation_subject_callee_hex_stage_000.js` `c02e092acbf4f34b40bcdea3d7fcd243a963b6b293fc56799ccf7ac164889876`	deobfuscated-js	annotation-subject callee-key decoded JavaScript at offset 0x1CEA	5809 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`deobfuscated.js` `95817b80bf4cdbb8214aa73a75a7ab8b89e885608f9a4edd33e8b8531621f1a5`	deobfuscated-js	PDF JavaScript deobfuscation pass	311036 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off0000496f.bin` `fb27c6f6ffe2b08a88f79f344ef3cb4f85460ac81a062194b6fd84ab6e48b628`	pdf-3d-stream	PDF U3D 3D stream at offset 0x496F	28021 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact entropy is 7.79, consistent with packed or encrypted content.

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