Malicious PDF — malware analysis report

Static analysis result for SHA-256 392bac6919a67850…

MALICIOUS

PDF

107.3 KB Created: 2018-06-12 09:41:10 -04:00
MD5: c6051102eaf0ee458f5bd688eb788985 SHA-1: 9851e8ddd622effaacdff5c2d8fb261759812e50 SHA-256: 392bac6919a678506341a49b235c692b0ef6ce2e0b43f322d2c18e9bb24afc45
160 Risk Score

Malware Insights

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

The PDF document contains JavaScript that automatically executes upon opening, displaying a fake Adobe Acrobat Updater prompt to lure the user. This script then attempts to submit form data to the malicious URL 'https://breakingnews.comano.us/XTXpadlZGcG9VVGRGT1doalZrMUNNWFpQVFhGR05rRlZhMEVyZGpOT2VsTmpjVnB0YkN0YU0wcEJhRVJGUkVneFpVbEZReXRpTjJ4blF6TkJkMU1yVUdsdFMzcGFkMng2Y1hFemN6SjFUamN6WjFKU05sQllibXRaUVZZd1dFWlRSVzR2TTJncmJDdGFTRTA5TFMxRGVWQTFZVmxXVGxwU2NEQlFlR1ZGTldkb1NtZEJQVDA9LS05Yzc1ZWE3ODUyNzI1NmY4MDU0OWE0ZWJiYTU5MGFjMzQ5NzUxNzEz?cid=898785210#FDF'. This behavior is indicative of a phishing or credential harvesting attempt, leveraging a common social engineering tactic.

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://breakingnews.comano.us/XTXpadlZGcG9VVGRGT1doalZrMUNNWFpQVFhGR05rRlZhMEVyZGpOT2VsTmpjVnB0YkN0YU0wcEJhRVJGUkVneFpVbEZReXRpTjJ4blF6TkJkMU1yVUdsdFMzcGFkMng2Y1hFemN6SjFUamN6WjFKU05sQllibXRaUVZZd1dFWlRSVzR2TTJncmJDdGFTRTA5TFMxRGVWQTFZVmxXVGxwU2NEQlFlR1ZGTldkb1NtZEJQVDA9LS05Yzc1ZWE3ODUyNzI1NmY4MDU0OWE0ZWJiYTU5MGFjMzQ5NzUxNzEz?cid=898785210#FDF
    • https://breakingnews.comano.us/XVEd4R1VGbHBXWEp2ZW1OblV6SkNaMHMyWTB0QlNUa3JiRkZZV0VKbWNsRTJjbXhLY0ZNMFNTOVNlRWhIVjJ4VEwyWnRlSFExVERCRlNXaHpUSEphZFd0M1JsVjVXVkYxVTB0RWQxVkNUekpWZUZBeFdYSnlVVGhGYTNOUFVWWXdialJSYWxSTVRWQm1hVE0wTVRWeU5YbFBWR0Z4WVdSTFpsQjRiM1JHWVRSUGFWQm5ZVVZaZDNBelVXMUVTbmhsWnpGbWJHaEhNWGw1TVhWeFMzTTJhbnBTY2xWUWJrSlZTMFJaUFMwdGNWZGhkM1o2WlRFd2VGUkZiRk16YWxKaFVEbENRVDA5LS1hYWYxZDY1MDBmMmFjMDIyNjUyZmE5OGQ1OTY1NGQyMzgzYTZlODY1?cid=898785210
    • https://breakingnews.comano.us/XVldweWFYVklXSFpyVmpWRFNtNXNZa1pPWlZvNUszVjBkRzFTT1VGV0x6RlJSazQ0V0VSWEwyZFFSRU5HTVV0U1VtbzRia1kyT1cxVVRYWXdSRkV4Vlcxa2ExZGtlVFJ0ZUhFclprdEhlV0ozWTJoUVV6VnVSbUpKT1VGQmQzTkZibXBNVDJsdmJHZG5VMlJKYlZWNFJFYzFWRUl2VldaalNUQkxMMk5SVVhkaEx6TnlSazlKSzNSNVRHMWlWR2M1VEM4eFZuTllOVTlKY214eFVHdzNLMUpMVFdsek1EWmpiRmswUFMwdGJ6bFRjMHBXYm1sYVNYcEhlVUZ1YlZoQ1dsSkpRVDA5LS0wMGZiMzhjZmU4ODllZDkzZTZmMWNmMDVlMzhiZTM5ZDI0YzljYTE2?cid=898785210
    • https://breakingnews.comano.us/XV1RCemEwdFdNV2xRYTBKT1dYRnZWWEV6VGt0ck1HRkNVVmx2YlhNd1VWTmFkMDB2WldobFRUSkZOWEpaVUhsRVJWWnhVWEpFYzFWbk9FaHFjbmg2TDNkaFZHNXBUMGxQYkZoMFdWbEZNRW94TlhKbWIzWm9TREZTV0VjclFtTkdOMkZRYm05RGQwNUNZMlpFYlhKeEwwVmxUMkpEYlhGNVlrRkxPSFp4UmxSb2NqUkRSbUptZDBjcmIzRjNkVkk1VHpGbVNXd3JORkJEUzBoTFN6VkRRakUyY0dsaGNsTlJSVXRWUFMwdFpFUnpRaXRqV2paUmFrZG5Ra0U0TURGb2Iwb3hRVDA5LS05Mjc4YTQ4ZjIzMGVhNzNhYmM3ZWM5ODY4NGI1MTVkNDk2MzNmOGQ5?cid=898785210
    • 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
d7c01c6c8639655b0e34468861a0611151b2a25432b577995db0eb1cb9ffc13e		 pdf-javascript-stream PDF /JS object 12 at offset 0x180A 600 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0012_001.js
1ebe921f5de972f30a99bad07e740f932c755c616bc064c8545d68ffbdcb5e83		 pdf-javascript-stream PDF /JS object 12 at offset 0x1831 103722 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s).
font_00_cff_off0001964f.bin
9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0		 pdf-font-stream PDF embedded font (cff) at offset 0x1964F 4575 bytes

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