Malicious PDF — malware analysis report

Static analysis result for SHA-256 abfcf1da4900ea88…

MALICIOUS

PDF

107.4 KB Created: 2018-06-12 09:41:10 -04:00
MD5: 379ee15dd47a85d60fb9e88491f57599 SHA-1: d7fd653c776b183f0db2573eb65707cb7497708d SHA-256: abfcf1da4900ea8847af299a9ad1b358cc51a2649a4a00d2983673fb136c4a88
160 Risk Score

Malware Insights

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

The PDF contains JavaScript that triggers a fake 'Adobe Acrobat Updater' alert, attempting to deceive the user into clicking 'OK'. This action then submits a form to a remote URL, likely to download a second-stage payload. The embedded JavaScript and the fake update lure strongly suggest a malicious intent to exploit user trust for payload delivery.

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://report-scam.malwarebouncer.com/XTldaSWJUaEtkMHhEU0VzeWJtSTVMM0JPWVRSMU9XVk5jMlZ0Ymt0TllXOXNLM0ZqVjJzdmJWaFNjVXhRYTNCVVUxaHVSbG81ZFROWVNIQXlkblpEVm1veFZ6VTFUbkpMVlVWS1YzSkhiVVJsS3pCc2FsZDBheXN6TW01eFRqbGxUM3AwYlZVNGNYQnVNMmM5TFMxaFVpOURiR1JaWkhWNmMyNTBaVkJ3YTFWYU1qUkJQVDA9LS0wMzAxOThkZGVjMWYyN2RmZDQ2OThlY2YxOWJjN2VkNjM0NGI4OWZk?cid=910650193#FDF
    • https://report-scam.malwarebouncer.com/XTVZVMFRVaFJSRU4xYVhKcU5sTkRla1ZHU1ZWUU5tZDFkVzgxUzI0cmEzcFVVMDlzT1dGSFp6WmtXVkZ4TVZsTVQybEJNV1JoTjBkNlJuQkNXSGN6UjNORGN6SklWVkZaTDNGclJYZE5kWEpxZUV0WGN6WnVUa3RoUmxaeVFXeERkbmQwT1UwcmJ6SlNhbWhyT1U5cFdWbFBNMFp4WjNkNUwzRnNiRlZMYkhOMFowWXJUeXRsUW1sbWJEYzVaRXhUT0ROQkswVXJibEV5Y25CNk5sZG5NVXA2TTIxVGVqSXZWMXBCUFMwdFNHTlpiSEU1TmpkRk5GQkJNbEYwYVZab1drNHpVVDA5LS0wZDkwMTI3YjhiNTFhYmM0MGZmODYxYzA2ZjAxNDA5ODZkYzIyNWFh?cid=910650193
    • https://report-scam.malwarebouncer.com/XWm05TVFtdDROMHBCU1haQmN6RnlSamxaUkVWb2MxWkdkRkl2U0hjMWVXdFhSR2hQUm0xUWJYbFVSVVYyYzFCS2JUTlJlVkpYVTBaaVJWTmhNVE5uTWtWa1VXWm9OR2xMY2k5aVIwdE1lRzVMU25oNlMwZFhjbFZEYW1sa1kwWTRlbGhUZEhKblQwWnRiRWRSUWxaVFJHbDFZVkJ2VFhsWGFVRm1lVTVTVFdST09VSkZURUZaYUZCMk1XOU1OR3B3TWtSRmFFaGpZMEZrVjBoQ1pVcGlRMFp4WjNSSFFpdDFiR0ZyUFMwdFNXZFNSa2hqUWtZdk9XeDZlRmx2TW05WFp6SjFaejA5LS0wYWIxNDc3OWIwODg4NmQxZWVlNmI0ODMyMDFhMWZjODcyYjM3MDgz?cid=910650193
    • https://report-scam.malwarebouncer.com/XTjJ4S05FaE1USFZsWlZSRU5sQXhhRXAzY1hoYU1GaHBXRTE0TXpKWFZtMHZUa05wYld4WmIyMXFRWE5SWlhSeFFXNVRkRXAyTDAxTGNVUmhhRkYwVkZKMFpUWlNRM1ZEWTBzMWEzZHBTM1Z2UnlzM016RTFRVlV4ZEZoYWJVc3dkMDVoT1dZMFZYaElhREJGZVU1cGNtdDZUSEFyVVRrM1QyRnlhbGxuTkdack4yZFhTRkIwUm05TFRXVlhjRFkzZWtaM01XVXhSM1JUYkM5bU5IbFZWbU5qY1hjMU1XMUpPVGd3UFMwdE1VdHhVVEZCYW1wMU5raERZV2xCZGtoTmN5dG1VVDA5LS1mNGY5NGQ5MTUzN2VkNmNjNjAzNzc0NWE1YjU1MzE1ZDM4ZTc2Njdh?cid=910650193
    • 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
d49919191a332bd38857660d24db2f5bb75528a337d3a1f153d7075cccd5b36d		 pdf-javascript-stream PDF /JS object 12 at offset 0x180A 608 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0012_001.js
cb4af1d7b74a5ae477a6e8a39b721b01bae9f70fa95dd7a54712554e5374ba51		 pdf-javascript-stream PDF /JS object 12 at offset 0x1831 103754 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s).
font_00_cff_off0001966f.bin
9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0		 pdf-font-stream PDF embedded font (cff) at offset 0x1966F 4575 bytes

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