PDF malware analysis — malicious · 1b4b2449b6c26b9e

MALICIOUS

PDF

46.1 KB

MD5: a8e429b32872d2e7532103937eb34826 SHA-1: c739e1f45db93c7579ebb7819381c2dda63e6df7 SHA-256: 1b4b2449b6c26b9e9fae346441d47b2728789cae0f38481ad85ecd80ebbcd221

126 Risk Score

Malware Insights

MITRE ATT&CK

T1204.002 Malicious File T1059.001 JavaScript

The PDF sample contains embedded JavaScript and triggers a known vulnerability (CVE-2007-5659) related to the `Collab.collectEmailInfo` function in Adobe Reader. Static analysis indicates this JavaScript is likely responsible for downloading and executing a second-stage payload. The presence of U3D content also suggests a potential exploit vector.

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)
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.
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` `857d6ef4d23102650aa9aea4e114da0906fe59fb62811951378edc561a79c469`	pdf-javascript-stream	PDF /JS object 9 at offset 0x49E2	550 bytes
`legacy_pdfkit_stage_000.js` `6c891817dc46f84694187b42ae205fda49185c04b8bea0ecefb8254fcba67b89`	deobfuscated-js	z-percent UTF-16BE base-21 decoded JavaScript at offset 0x1D61	5844 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`deobfuscated.js` `d5b44ebda8d1ee2d473cead88734fbdc5666ce86755ad5f7436f38dc4fca84b3`	deobfuscated-js	PDF JavaScript deobfuscation pass	262138 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004c48.bin` `a96e1fca2499edf504d3934052ca1fc338d4b4898a65e6a361937ed1ba0dc0fe`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4C48	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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