Malicious PDF — malware analysis report

Static analysis result for SHA-256 14848540f8d8897d…

MALICIOUS

PDF

107.4 KB Created: 2018-06-12 09:41:10 -04:00
MD5: dec5a2b197033baf2f8da8fc7901118a SHA-1: 9722fda8417ee7b280de7b733a86b6e883554e9b SHA-256: 14848540f8d8897d95911edd18e698362ed0df85417dc4f06e8cc40e85f87b2f
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 Updater' prompt to the user, attempting to trick them into proceeding. Subsequently, it calls the `app.doc.submitForm` function, sending data to the malicious URL `https://web-login.malwarebouncer.com/...`. This indicates a phishing or credential harvesting attempt.

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://web-login.malwarebouncer.com/XZWt0Qk5IcE1OV2hpY2xKSlpYaHRkMk16ZDBoNE1Tc3ZXR2x6Y21jeVRFeDFVekZGYlROb2VubDJiSEZHYTBKc1RrOXNMMDV6V1RSQ1VFTlBUREZGY21kUFYydzJSekZTVDFCS2NWUjJkSGxvTUdaUmRFNUdkekpDVkd4WU5GWTRabUZ1TVc5SFpTdDBOMVU5TFMxek5FNUdSV2hUV2pkcVJqZFhXRUZqVldsU1JtbDNQVDA9LS1iOWYyOTAwNTdjOWNlZjYwNzI2Njc4NzY3M2JkNzc4NTZjMDE4ZWE4?cid=910561351#FDF
    • https://web-login.malwarebouncer.com/XUlVSVk9IVjNUR2QzZG5Zd1QweFBSSEZVYVVSMWIwTTJiMjlJVDNKWlFVSnlOakFyT1hZclYxaEpSamxIU0d0TFVucEVibmxxVVd0Q1F6Tktla2NyVEZCMGR5dEtNV0ZuU0N0amVtZ3JNRmxJYkZaTk9YVnhWVFJ4YlhSa04zRTBhaXRXYmtaUlZDdENkMlpYV2tSa1QwVTFOalYwYW05R1UzRldRUzlyVUd0eE5VMXdNbTl5V21OcVZHVjNhalJhZVRKMmRIZExVSGRoSzJwUVVIRkxVMWQyWm1oRGRrcFdVa3h2UFMwdFpIZzFlbGw1WW5WTWEyeHNkbWt2TURSQmJGQldRVDA5LS03ODdiMzYzNGFjZmI5MWVkZjJlNzAxYzhlZDY4YjRhODgwNWRmNWZh?cid=910561351
    • https://web-login.malwarebouncer.com/XUmtoaVJYRnpVbmR5VVd3d05WWmFSalowV1U1T1ZIQmhWamhsVEVGQ2NHSlFVRkU1WlhWVGJ6SlJiSGhNYlhsblkxZ3djbHBqTlV3d1ExaGFObWhRVnl0c1ZsRnViVE4yUVZWVVRXUkdRekY2VlhCUGRpOXFhMWhhYzNGQ1RreGtjREIzZVdsRVFuWTJhVk0yWWs5RmExaHhiM1pOT0VkWVJIbE9iRXBTVlVkbWRXeFVibmhwZVVGSGIzb3dNbVl3V1RKTWVUSllhRzl5YlhKUFMzbFNiek5LU2xkQ0wwbEVURTVGUFMwdGVDOHJSRVp5VVZGYVltbGFTMU5TVEVOcGFVWjFVVDA5LS0xZDY2ZjFiN2QyYjM4Yjk1ZGRiYjUzMzU2YzZmYmJjMzIzNThkYjIw?cid=910561351
    • https://web-login.malwarebouncer.com/XVnpWWVdqQlhUbFJrUkdKb2MzWkpWa2xUVWpOcmVUTkJaVEoyTjBKQk5XdEJka2Q0TTJOc0szSnhlWEI2U0hBemNqbENSM0JJYTBOdFozWmllRTVaZUVGWk9HZG5PRVp5VjBsbFdHczFlamxaUWtsMlkzQnJNMkZNWVRJeFJIUklhVWxsZVVsSU1HcHVOMHd3YTB0eFVVUnNWelY2YmxCRFEyUmtjeXRDV2xCTmNHdGlOelp5SzB0VE9HZEpUVU5VVm01WU56RkxOVTFHWjJONVJrNHlORmRoUkROQllrTlFWM2RaUFMwdE5ERmxibmswUVdWdFNHazRkVzlGWW1kSE5sTlNkejA5LS04M2IyODllNTcxNWYzY2FlZjFlNWE2ZThlZWRiZTczYzM2NDA5YTRl?cid=910561351
    • 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
392185a43da66ba3e2fee848092e050b82cf9c79e352af0af67c3b3315b3daac		 pdf-javascript-stream PDF /JS object 12 at offset 0x180A 606 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0012_001.js
f324f4a11d4d6659ee91d7b0ef631f672049f37380fcd13733cfadc4422f794e		 pdf-javascript-stream PDF /JS object 12 at offset 0x1831 103746 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s).
font_00_cff_off00019667.bin
9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0		 pdf-font-stream PDF embedded font (cff) at offset 0x19667 4575 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.