PDF malware analysis — malicious · d30e6569b31ab17d

MALICIOUS

PDF

312.7 KB Authoring application: PyMuPDF

MD5: d3b43f86792c0a42681d41e942281860 SHA-1: 96b27722e5569d7272896a99b96be482e1cbdfd6 SHA-256: d30e6569b31ab17d28901bc3a1105b617b447fc2212dae110380228b429a0b98

102 Risk Score

Malware Insights

MITRE ATT&CK

T1204 Malicious File T1204.002 Malicious File: User Execution: Malicious Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1059.003 Command and Scripting Interpreter: Windows Command Shell T1059.007 Command and Scripting Interpreter: JavaScript

The PDF file contains embedded JavaScript and triggers a critical heuristic for CVE-2026-34621, indicating a vulnerability exploit. The deobfuscated JavaScript stream is large and contains suspicious elements, suggesting it's designed to download and execute a secondary payload. The presence of multiple JavaScript streams and an embedded file further supports this malicious intent.

Heuristics 7

Adobe Acrobat/Reader privileged API chain — CVE-2026-34621 critical CVE exact CVE_2026_34621

PDF JavaScript matches the CVE-2026-34621 exploit chain: Acrobat internal UI/share APIs, swConn prototype/getter manipulation, and privileged RSS or file-read APIs used for staged command-and-control.
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.
Embedded file low PDF_EMBEDDED

PDF embeds a file attachment — could carry an executable or another weaponised document as a nested payload
Optional Content Group with action trigger low PDF_OPTIONAL_CONTENT

Optional Content Group (layer) co-occurs with an action trigger — content can be selectively hidden from viewers or scanners while the action still fires on open
AcroForm button with action trigger low PDF_ACROFORM_BUTTON

PDF contains a /Btn form field together with a SubmitForm/URI/Launch/JS trigger — this is the building block of fake 'Download' or 'Open' button overlays used in PDF phishing lures
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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`javascript_obj0011_000.js` `ac4aa71c501d251717ff180f71d09f948b98863a4f321d6425e972c101ee65c0`	pdf-javascript-stream	PDF /JS object 11 at offset 0x185FA	643 bytes
`acroform_b64_00.js` `30b37c04b7674373a869ca58f4e954426a1eb4b2dcc8e9bc96af01153e15d561`	deobfuscated-js	PDF AcroForm base64 (raw) at offset 0x4AC	73936 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 7 eval/decoder/string-building token(s).

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