PDF malware analysis — malicious · 2f4c42a678dc6efb

MALICIOUS

PDF

45.8 KB

MD5: 99adfa5584c7540118dffcf97e846854 SHA-1: 9a1bbf840fe0668f661ad1909ac70356121044dd SHA-256: 2f4c42a678dc6efb88432bed302b27f2d7a13f25681e7c344b9e466f39cccc2d

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link

The PDF file contains embedded JavaScript and leverages the 'collab.collectEmailInfo' function, which is associated with CVE-2007-5659. This indicates an attempt to exploit a known vulnerability in Adobe Reader to execute arbitrary code. The presence of multiple JavaScript streams and a U3D content reference further supports the exploitation vector. The primary attack pattern involves tricking the user into opening a malicious PDF that triggers an exploit, likely to download and execute a secondary payload.

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 0x48A0	550 bytes
`legacy_pdfkit_stage_000.js` `9db2d69c5be664de3f118e7657e2fbcca84c903135cb1d80125b07331724b17c`	deobfuscated-js	z-percent UTF-16BE base-21 decoded JavaScript at offset 0x1CE8	5832 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`deobfuscated.js` `faff68ed224bf9ee25f12c83b0a2b35a62620ad7cfa3cfabdfe82f1799999fb0`	deobfuscated-js	PDF JavaScript deobfuscation pass	259112 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004b06.bin` `a96e1fca2499edf504d3934052ca1fc338d4b4898a65e6a361937ed1ba0dc0fe`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4B06	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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