Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d9a09832f9dd3c7…

MALICIOUS

PDF

107.4 KB Created: 2018-06-12 09:41:10 -04:00
MD5: dec29b17831ecb62494bab7e7f7e1818 SHA-1: e138dd932dceb0b11e71df7bb158dd34e5cea41e SHA-256: 7d9a09832f9dd3c70b88a7e0192c7b8d383ddce8f37425f5db792c0d3fedd77d
160 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that automatically executes upon opening. This script displays a fake 'Adobe Acrobat Updater' prompt, attempting to deceive the user into clicking 'OK'. Upon user interaction, the script submits form data to a remote URL, likely initiating the download of a second-stage payload. The presence of JavaScript and the fake update lure strongly indicate 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/XUTBNeWVtUndlVGRzY1RKWVpqVmlhbFZpYnk5TU5uRk9hRkZ2YldWTk5sUTVaWFpOVjBkQlYxbHlaV3N2VEhaS1RHbE1XWEZTVTNwNllVRmxNRGxyYVZGbWNUY3JTbkpTZDBodFNVSnFMemRUWjFKV1p6QjBOMEpxZVZWSFZWbzRha3N5TWtObGJETkpOV3M5TFMxeWRFZHVja1pMT1dreVNubHlhMVp6YTNoNlUzZEJQVDA9LS03ZWUzNDU5MDQwM2YxOWMyYmZkNmJiMTVjMmFkYWUwOTAyOTBhYWZi?cid=906245998#FDF
    • https://report-scam.malwarebouncer.com/XWjNwRmJXVkdkSGxJVWpoNU0zRXlkM05VTTA1b2VrTlJXWGhaTlVjeFluVlFPSEpoY0dNM2FFWnlPQzkwVGpacVYwbGFVVGxKVEZoTlJqRkpPVzV5YW14U2R6STBkbkl4SzNjNU9VZHZaelYxZVU5dVprcGFRazB6WjBVNE5WQXllbEJGUzA1R0wxUXpWMHBLWTJRNWIwazROMkZWU1hKeU5VOXpWQ3MyWm14RFZrMVVlbUZOYzBSVlFXMTVLekZNVGpGaGVEUTBUbXhCUXpremQzTkxRbVZsY1hWTlZ6WlNiRWRqUFMwdGJ6SjBjMVZLWkhCTWRGQlNZWFZJTTJFdmRVUm1RVDA5LS1hNGE5ODU3YTdjMzg3OTRhYWUxNDBiMzU2ODcyMGE2YWMzNWU5MDVl?cid=906245998
    • https://report-scam.malwarebouncer.com/XUldKWVIyVlRLMDVTVVV0dWRtNUliR2hvV0RsbU56aERSVEp4Vm1kbmVraHhjMWt3VEZGQ2NpdHlabm8wYkU5dVUwOVZaMUJuVjJkMmNYbE9SMjV2VERGbkwzbGpPSGhsZGpSalRFZFNWVFUzVDNkSmJYSTBNMlZRVW5sc056UldaMUl2VWpsNlNWQnFTMFJKU1Zwdk9EVTNVbVp3U2twV1VUWndSRlZYVkVjMVFqVlBibVkyTWt4dlRGVlNVVGwyV0dzMmR5OVNRbEJ0TVM5dmN5OXJUMHAwWjJGS1ZVaDFaakZuUFMwdFQzWklTM05CWms5S1pFTXlNa1U1Wlhsc01GZHRVVDA5LS0xZThmMzU4MmExMjJmMDI4OWM1ZDk2YTkzN2ZlOTQ2YmI3NWZiY2Q1?cid=906245998
    • https://report-scam.malwarebouncer.com/XTUVRdmMwWkVaRk55WWxGM2JuYzNaR1J4ZGtGd1kzSkdNWE12V1RWS1dtSnhabWRJYldGM1oxZFVkMlYxWjJkaWRWbFRVMmN3YmpVeWJucEJWV1k1ZG5WMlYxQnhPVE5DV21FNWNXa3ZaeXR0ZFVONlpXbHVTM2hVV0hOSVZtZERXbVJ3VTFoaGRTOUtSSFZaT0ZSNFp6Wk9WVVUzUnpoT1ZXdEVXWFp1U1V4UVNGZG1NbkJ2WlZWTlJuTm9VMHd5ZGpZeGNUQndha0o0VERKa1VVaFlVVFpTWmtobk56ZHhhbXBOUFMwdGNFOXdXa2hYU0RrMVEyVk1WRkpoTUhFM1YzaHRVVDA5LS01YzRkZjBiYzMwMmYzZWFmMjk0ZjBjZWY5ZWZhYjA4Y2VlNWY2Zjdl?cid=906245998
    • 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
f1f2240af0375d058403ee74ceb8f3551162d597efa9c97d4b0f9eec0e0147c2		 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
7c18ea13b9df875a9b5070ea8aa800784cfab0de59aeaa5be071755def1b119c		 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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