Malicious PDF — malware analysis report

Static analysis result for SHA-256 d087e508e4b4b40a…

MALICIOUS

PDF

107.5 KB Created: 2018-06-12 09:41:10 -04:00
MD5: 8b11bc7c37555771bffb7663da380ca2 SHA-1: cbb8b9c99acf1a65b04b5eb1aeddecb0c4583aba SHA-256: d087e508e4b4b40a54d2dc28b84bc6ee5766490c2e98ca999e3d549747caf894
160 Risk Score

Malware Insights

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

The PDF file contains JavaScript that automatically executes upon opening. This script displays a fake Adobe Acrobat update prompt to the user, attempting to trick them into proceeding. It then uses the `app.doc.submitForm` function to send data to the URL `https://cardpayments.microransom.us/XY0VWblVHWXhXV3BzVWpaSFNrbEhiVkJVYTNST1JXcG5UR3BaTURWb1NHdHBlbFZGUkRCNVozTXhTVWhoZFdaVk1saFBja04zZDFoNFJsRldUSG8yZUdJMmVsUm9PRnBqVGpOVE5GVndaMGgwY0hkVWMxUnNTRTl0UTBvcmEyeG9LMVJvS3psUVZHcGhkakE5TFMxTFpVWmlTMlpOUXpodFRVdFZiWGQxWVdSdU9GRm5QVDA9LS1hZDkyY2EzNDlkYWMwMjkwMTkzNTU5NzgyY2ViYjQ1Y2MzMDNjMTEx?cid=904625532#FDF`, likely to exfiltrate information or download a second-stage payload.

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://cardpayments.microransom.us/XY0VWblVHWXhXV3BzVWpaSFNrbEhiVkJVYTNST1JXcG5UR3BaTURWb1NHdHBlbFZGUkRCNVozTXhTVWhoZFdaVk1saFBja04zZDFoNFJsRldUSG8yZUdJMmVsUm9PRnBqVGpOVE5GVndaMGgwY0hkVWMxUnNTRTl0UTBvcmEyeG9LMVJvS3psUVZHcGhkakE5TFMxTFpVWmlTMlpOUXpodFRVdFZiWGQxWVdSdU9GRm5QVDA9LS1hZDkyY2EzNDlkYWMwMjkwMTkzNTU5NzgyY2ViYjQ1Y2MzMDNjMTEx?cid=904625532#FDF
    • https://cardpayments.microransom.us/XUjJWMk4wcEhjbXc1VmxoclNESjNNMnQxVVdKR05GYzJhRXhzTTNab1RIRjRhbVprYVVSTk4yZFFaVlF6YTFWT05tc3hWRXBMTjNrMVNtOU1XREZWWlhOWEwwWTNVbUZZUjJSc015dG9NSE12VWtaM1NUQmlhelF5T1RZMmNYQk9TMjVWYVdSQlJHSkdTV2cwWVVGc2VraGhiWGRVZW5KNlJqbHlXVXhJU21kdE9IUkNXR0ZZV21aWGIxa3dTSFI1Y0dsd2QyOURTRGhNTm05aGFsbDFjakp6U2pCak5HVkZTbmRyTjFaS2VtVkxjRWRoZFhKblJISkVXRVVyT0ROWExTMVlXRGtyVjIwcmNDdGtTbEF3V25oM2VrUkRRM1puUFQwPS0tYjkyMTI1NWNhMGY2MDkyYjUwYjIyZmM1ZjJiOTZjMjgwODBhYjcwYg==?cid=904625532
    • https://cardpayments.microransom.us/XYnpGcWJWQkNOMGh1Vm1FclJuTXhXV05DWlUxYVQxcHBWeTlXY0ROSVQyRldkbk4xTmxFNWJVdFJRVUkzU0dkTVRGUkxVbUk1TkdSa1JETlBXbXBWUjB0cldUa3paekpyUTFWWVZucE9NbUZST0V4MFRWSlVObXBWUnlzeVkyZGxhaXREZVc5SmFFa3lkVGxJWTFsb1ltMWFSbVI1ZGpKR1RGaHRTR3hCYm05bmVUSjJOWFkyTHpGVkx5dEZVV3BXUVVZNFlWbDNjemxZVTI0NEswMHJaREptU0c5MVNXVlBZemcxWkVkamVtRkVlRzFsUWs1MFpsWlpRbVIxTjA1T0xTMUNVQ3RyTVVkSlVqQTFPRVphV1ZZM1V6VTNibVZSUFQwPS0tNTIzMTBkNTk5YmQ4Y2U1OTI5Mjg3NTMwODEwMzUwNTk2MmRjOGNhMQ==?cid=904625532
    • https://cardpayments.microransom.us/XVFd0NFYyUnRVRXB2VlV3NGVYUTVUMmRxUzFOM1pITlBjV1V5VUdWemJ6aHFlWE40TkZKYU0zVTVObVJCV2xGcmVuaDBPVEJDZURseGMycE9PV04wZFdwa1FuVk9aREZHU2tOb04wVnRUMHBMWW1GclZpODJNM2R3ZDNSSFVUTndhbU0yVlRkaGRXeGFhM0ZJVFVKMmJsRmlWMlJ2Y0ZRd01VZFZURzFqV1hOek1YVlZORlJ6YlVwMFozQlVORzFsU0dGVFVVNWxXblJrYWxCR05GTjRTSFo1UWtZMVdIUm1TSHBJZWpkRVVUTjRLMDlrYW04M1kyRTRTbVJvUW5OQ0xTMUNWR28wYVhoVE5IRmtiWFUzVGl0WWVWYzJhVnBuUFQwPS0tZWY1N2UwNjcxNDg1YmJkMzBkOThiODRlOWM1MmJiMmE0MGM2NjA5MA==?cid=904625532
    • 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
927a1c0bcb810fbeb8920c90f8c80cc382a06d41c7c1c9b2994a37a462284e40		 pdf-javascript-stream PDF /JS object 12 at offset 0x180A 605 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0012_001.js
cba05c8ec79689d37753ca00aa57be7773ae2d5a59b175b53615a3f9bdd2506a		 pdf-javascript-stream PDF /JS object 12 at offset 0x1831 103862 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s).
font_00_cff_off000196db.bin
9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0		 pdf-font-stream PDF embedded font (cff) at offset 0x196DB 4575 bytes

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