Malicious PDF — malware analysis report

Static analysis result for SHA-256 8647eeaed7678bd2…

MALICIOUS

PDF

107.4 KB Created: 2018-06-12 09:41:10 -04:00
MD5: f929a63f6a549b051f6deff4f6f63c6b SHA-1: 8535bc165e140336522af4e474abfdd7c7f95bc3 SHA-256: 8647eeaed7678bd285bb5131f0a81e834eac80041d133bf44f1e2ad3c480bb9b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment T1071.001 Web Protocols

The PDF file contains embedded JavaScript that triggers a fake 'Adobe Acrobat Updater' prompt to deceive the user. Subsequently, the script attempts to submit form data to the URL 'https://webconference.protected-forms.com/XV1hkQlJuVTVNVEl2YW1SQlMxUjRjV3B1WXpSSWIwdGhSV1IxVkhCQ2VsUlpkRWN5V0VaUGF6ZE5VakZXVGxrMldrZ3hXVUZoTkhsUlRXWTNUbm81WjBseVExSk5OakZKV2pWdFJEVlRSVGRpWlVScGFWUm5SRlJNYVVVMmFrWjFVRmx6VVRWemJFMUVUakE5TFMxQlJ6WkNVRU0yTjNGalZsazJObXQxYlVGUU0yMTNQVDA9LS00YTFjOTIzNjkyYTNiNzk0MmM0MWU5MmE0MDI3MDA3MGNkYmNjMzEx?cid=913199813#FDF'. This behavior is consistent with a phishing or credential harvesting attempt disguised as a software update notification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9477

Heuristics 8

  • 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 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://webconference.protected-forms.com/XV1hkQlJuVTVNVEl2YW1SQlMxUjRjV3B1WXpSSWIwdGhSV1IxVkhCQ2VsUlpkRWN5V0VaUGF6ZE5VakZXVGxrMldrZ3hXVUZoTkhsUlRXWTNUbm81WjBseVExSk5OakZKV2pWdFJEVlRSVGRpWlVScGFWUm5SRlJNYVVVMmFrWjFVRmx6VVRWemJFMUVUakE5TFMxQlJ6WkNVRU0yTjNGalZsazJObXQxYlVGUU0yMTNQVDA9LS00YTFjOTIzNjkyYTNiNzk0MmM0MWU5MmE0MDI3MDA3MGNkYmNjMzEx?cid=913199813#FDF
    • https://webconference.protected-forms.com/XZW5OQlFVUndkVXBUUms1V1MwRkxaRUpST1RkbGJFSlRVbVpXTkc1NFNXOHJZemhKUWpkNmNsUXJNMjl5VURCcE9VcFdkRkpwY0ZWVFYzbG1aMnB3TTBselQxWmlVakY1TlhGUE5ta3JaR0ZzTURONFpqUkxSMUJGVWl0cmVHYzJTVzl4TUc0NVdVeEtkM0kyUlhSa1NHTnFjVFpPU0VwWGFWbFNVbmR0Vml0TlJpczVZazF2UkhBNE9USnlUbkJMUVZkRVZrZzNURk0yT0RCaVpuaE1WRmc1VGpVNFprZFJiVlpyUFMwdFNuUXZUa0p2VGtGb09VRmlWakpaT1ZWQ1Vpc3JRVDA5LS1jNjJjZmQ2NTIyZDI2ZjY1ZmM3Y2YxYWZjMDg1NGUzMTFiZjE1ZTIz?cid=913199813
    • https://webconference.protected-forms.com/XWkVGQ1RUVnlaMncxUkVSTllsWXlZbnBqUW5GclRXNXVVRzg1UTFScFRUaExOV2xVTWpodFdsbEJRVXBKWjJacFduaE9TRkF6ZDNKa0wzUlhhRVZ4ZWtkWFMzaE1kRzVMV1ZKdmEwRktiRkpQYjIwM1ZITnJkek5KVUhCd2MzZHZPRTVXYzBVMksxZHphRFphTVRsdWNWbGxhV2RhWmpJNFIxaERReko0Y0hKTVpuZ3dlbXdyY0c1TWNFSkNZbVYzVms5cU5IUllaVzg1UkVKVVVtZGhTbkZTV1U1clFWZFNRbmRGUFMwdGFYVjFUMjlUU1N0VFoybHBaMXBIYlU5aWRUZFVRVDA5LS00OGUxMmNmNjQxNjU4NzNmNzM0NjZjNzliMTgzY2Y5OTQxYWY2YWNk?cid=913199813
    • https://webconference.protected-forms.com/XV1RSbU9IbGtPVU5yVmpOVVMxcEZNRGw1YzFaM1UwSjNlRmhXY3pGeE5TdGlSVkpETldsRU1FVkpkMkl4U1VaWU1YTnJaemRCZWpSVWFUSXZkR3ByTlN0alZFNUxNVVlyYkdKM01VTkJNVmRvUTJOVmJGaHpibVF4TVhOeVIxUmpUVzFDTkcxNFJWbEdkMGxtY2tWTVpTdHdMMWhJVDJ0bmFtdzFNalJGVTBOdVFuaFFTSFF6ZFRCWFpUTm9ObTU0Ynl0WVdqSjFaek5ZZWxkV09FTkljR0ZDZFcxWmRubHFRVE56UFMwdFJFVk1aMEpXTkZSNWJHOXpXbVZJTDJoVVUxWTVkejA5LS0wMjU4MzIxZGYyNGY2OTcwOTU5Mjg5OTExMmZkMDc3OTRkYWZlNmM2?cid=913199813
    • 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
1dfa42223c941972708d0d13ed61a08158c5eef7e78214b552067531490876a5		 pdf-javascript-stream PDF /JS object 12 at offset 0x180A 611 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0012_001.js
fd82e4eb2fad86112063aca0866cbbf22856857fec12f40d070066a4498dda3b		 pdf-javascript-stream PDF /JS object 12 at offset 0x1831 103766 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s).
font_00_cff_off0001967b.bin
9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0		 pdf-font-stream PDF embedded font (cff) at offset 0x1967B 4575 bytes

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