Malicious PDF — malware analysis report

Static analysis result for SHA-256 03f1a5ee0e3b2871…

MALICIOUS

PDF

107.5 KB Created: 2018-06-12 09:41:10 -04:00
MD5: 089794179412296516c73a180b2be4c3 SHA-1: 5ab6b8f3339a0669e777fc9ffe810299e9c25875 SHA-256: 03f1a5ee0e3b2871ffcd2b8423907dc15b302f1ef11fd6d7fda7b11d8d323744
200 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains JavaScript that automatically executes upon opening. This script displays a fake Adobe Acrobat update prompt to the user and then submits form data to a suspicious URL. This behavior is indicative of a phishing or social engineering attack designed to lure users into interacting with malicious content or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

Heuristics 9

  • PDF auto-runs JavaScript form submission on open critical PDF_OPENACTION_JS_SUBMITFORM
    PDF uses /OpenAction to run JavaScript that calls submitForm() with an external HTTP(S) URL. Opening the document triggers the outbound submission path without requiring a normal link click.
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF JavaScript shows fake Acrobat updater prompt high PDF_FAKE_ACROBAT_UPDATE_LURE
    PDF JavaScript displays Acrobat/update-themed language such as a document rendering engine update or remote connection to Adobe servers. When paired with JavaScript or external submission, this is a social-engineering lure rather than benign document text.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://na01.safelinks.protection.outlook.com.url.protected-forms.com/XVERkdFQzWkRRbVJ6WWtwSlZXVkROR0ZESzI5dlJVeFRZVkJvV1dkQ1oxUTNjVnBHTUhOcGJVNVJZVkUyZVM5SWRHZHdaMFpRWmpCdVdrWlNRUzgxUldsaFVqSm5OSE4xZERaa1kwZDRaMFpWWTNBdlowRTJWWEF6Y0VscmFGWmtNVUZ3VjBKSFRucFRNbWM5TFMwelFXTjBaWGxrTm5KcFlubFRNbFl4TjFSYVNWZFJQVDA9LS05MWRjMTM3YWYwZWFhMWJhNTI5MDg2MmEyYzFmYjAwN2FkYmU1MmJj?cid=914314930#FDF
    • https://na01.safelinks.protection.outlook.com.url.protected-forms.com/XVGxsRE5tYzNUalozZDFkcVFrVnZWVGRyVVhweEwzVXZSRFJqVWswMU0zQmtWVGRVZVROcmVHbHFjV2N6VmtKalRWTnVUM3ByWlU1NGNpOVJVMWh4VEZSQ2NWUXJNMDlpWjBSbWFGVmxWVUZRT0hoeFkxZERjblJwVVV0bE4xaGlZVVJSVmtGWE1YcFBSVFo0UnpOUVZua3dkV3hFWlU1cFVqVldTalZqZEhZNGFuSk9WVUpRYWsxeGFqZ3pVMFZpVm1sTWJuWmlVRmhCU25kM2RTODRWbGhzZVhOT2FFeFlObmhqUFMwdFdIZEtVWGcyU0hrMk4xaDZWR3hOWWpGRU0xUTNRVDA5LS1kMmFiZjRhNDg4YjFkMjhiN2MyZTQ2NWEyMGI3MTI2YjNhZWZhYWIx?cid=914314930
    • https://na01.safelinks.protection.outlook.com.url.protected-forms.com/XYlVFNFEzVlpTM1Z6WTNFelpraE1aRXA2VFVKQlEwWjZOMDR5YjB0dmMzUkpXRkpyUkZOMGMwcDJLMnhQVVdkT1RVRmtRMlYzUm1aTU1sVnVkRGRYY1RjeVVXRmtkbFlyYldFd1oxZDFXVFpyWldwRmNrOUJUSGhwUWs1aVFVdzFNbGxpSzNCQldWSnpjV1JWZVRGM2IwMVpjMUZ2V1dwcU1qTXpOMGQzVFRJd2JGaGtNamxLTjJoU1VUbGlNMWcwTWtWb1ZVSnFabmg2UVRGdFRtZEpUVXBKUmxsVVVWTXlVSHB6UFMwdGRXOUtSRFZqVm5sb1ZWRkhNMU5oUjJsQlQzRnZRVDA5LS0xODU5ZmQwZGU0YmY0ZTBlNGIxMTlkNzY3NWJkMmZhYTkzM2Q0Yzg5?cid=914314930
    • https://na01.safelinks.protection.outlook.com.url.protected-forms.com/XUTJ0T1JscGhNbWhtU0hsS2RUbFhNRVJyTjFwV1pEZEJlRm81U1RodkszZElNMnRuYVhsc1Nub3hjVzlKY0dsaFoySlVaRkE1T0V0RE0wdEVabFp5WjFReFEyUXhWVWxXTVdZMWQwNWlaWFI1VEhWbFlqUjZjWE15VjFGd1dFYzVTMk5WZW1kQ1pUWTNRMVF5UmtKc1RsVmFTVkpJU1drMllqaGhSWGxwY1hadlRUUXllV2hWYUcxQ1YwMUlWRk5rY2xGTWNucFBUa0V6WWt0b1RIWnRXaXRtVDNSaFEzcFFNbXhuUFMwdFYzcFJja1pUUzB4VE9YcElRblJQVGxSWE0yaFZaejA5LS0zZDNiOWUyOTJmZWMyZjcyMmMwZWNkNmJkMTVkNTA4OGRjMDY2MmY3?cid=914314930
    • https://na01.safelinks.protection.outlook.com.url.protected-forms.com/XVGxsRE5tYzNUalozZDFkcVFrVnZWVGRyVVhweEwzVXZSRFJqVWswMU0zQmtWVGRVZVROcmVHbHFjV2N6VmtKalRWTnVUM3ByWlU1NGNpOVJVMWh4VEZSQ2NWUXJNMDlpWjBSbWFGVmxWVUZRT0hoeFkxZERjblJwVVV0bE4xaGlZVVJSVmtGWE1YcFBSVFo0UnpOUVZua3dkV3hFWlU1cFVqVldTalZqZEhZN
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://ns.adobe.com/xap/1.0/
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/tiff/1.0/
    • http://ns.adobe.com/exif/1.0/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
javascript_obj0012_000.js
fd2e22f683e9293bbd9ee03f049b3f07e56fd7e0ab5430d8b22a45563d866843		 pdf-javascript-stream PDF /JS object 12 at offset 0x180A 639 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0012_001.js
e1a6e3a5f71529734d8a6e267d0633b355f42db684be3f930ded6857455bbce4		 pdf-javascript-stream PDF /JS object 12 at offset 0x1831 103901 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s).
font_00_cff_off000196eb.bin
9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0		 pdf-font-stream PDF embedded font (cff) at offset 0x196EB 4575 bytes

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