PDF / .TXT malware analysis — malicious · 4b3b088440755cc7

MALICIOUS

PDF / .TXT

45.2 KB

MD5: ee6b89f8ec4658bb5993f6c9cee643e7 SHA-1: 5995243397f0e1db6a7919cbf804d159053c66c0 SHA-256: 4b3b088440755cc72eb5243e2331eb62d7a72ecdbfa6a41b00167cb10f739535

126 Risk Score

Malware Insights

MITRE ATT&CK

T1059.001 PowerShell T1204.001 Malicious Link T1204.002 Malicious File

The PDF file contains embedded JavaScript, indicated by multiple heuristic firings including 'PDF_JAVASCRIPT' and 'PDF_JS'. The critical 'CVE_2007_5659' firing points to the exploitation of a known vulnerability in Adobe Reader using the 'collab.collectEmailInfo' JavaScript function. This suggests the primary attack vector is likely a drive-by download or a user-initiated exploit via the PDF. The embedded JavaScript is designed to download and execute a second-stage 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` `571d6d781ee734c470db0b973d3bf8bb037ccab9ee14b53d1a6190433ad265f3`	pdf-javascript-stream	PDF /JS object 9 at offset 0x4602	554 bytes
`legacy_pdfkit_stage_000.js` `ef0b5f379c25820197329b933fade4baf787c23e1cf43c18e77c36423179bfc5`	deobfuscated-js	z-percent UTF-16BE base-21 decoded JavaScript at offset 0x1BC7	5501 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 5 eval/decoder/string-building token(s).
`deobfuscated.js` `ff86ebf179bbe41155f5c122d00bea935940e8e6f535000186fedc8dde76ae7a`	deobfuscated-js	PDF JavaScript deobfuscation pass	248076 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 2 long base64-like blob(s).
`u3d_00_off00004865.bin` `a96e1fca2499edf504d3934052ca1fc338d4b4898a65e6a361937ed1ba0dc0fe`	pdf-3d-stream	PDF U3D 3D stream at offset 0x4865	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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