Malicious PDF — malware analysis report

Static analysis result for SHA-256 67e9dba561a13a6b…

MALICIOUS

PDF

107.4 KB Created: 2018-06-12 09:41:10 -04:00
MD5: 66e7e290c7466f7e3f2ad719148db8b2 SHA-1: d6ec051be71a54865cca26d8675bfa6b25155d0c SHA-256: 67e9dba561a13a6b5aab5836d4557ab3f8284ef85cf1e23a37537af0d790bc78
200 Risk Score

Malware Insights

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

The PDF contains JavaScript that automatically executes upon opening, displaying a fake Adobe Acrobat updater prompt. This prompt is designed to lure the user into clicking 'OK', which then triggers a JavaScript form submission to the malicious URL 'https://token.onelogin.com-token-auth.com/...'. This behavior strongly suggests an attempt to exploit the user through social engineering and potentially download a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9477

Heuristics 9

  • 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 link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://token.onelogin.com-token-auth.com/XWkRWQ2RXcE5SbXhPUTBsUWMxSk9RMjFXYkdFelNsaDBSWEZqUWt4NlNITkJkSEZuYTBkUFNYTkJiVFpFVDNGM01HNDNiSG9yTDNsR1ZsZFFlRFJtWkRob1FqVm5ORmRQUTNKU1MwSjZZVlZFZFZKTVdtdHRORkprTWpGRVNFeE5WMjAxTUhGbEwyTmFiREE5TFMxYVNEZERTMDh3Y25Wb2QyRnVVbWgwT0doT1ozWjNQVDA9LS1jMWFiNmIxZWE0OGZlYzg3NzA2YWU2OTU1YTEzYTcxNWFiY2UzYjg4?cid=915758588#FDF
    • https://token.onelogin.com-token-auth.com/XVVZwc2RUaDFRM0pNV2xaek1GSkdhbFJLTkM5UVNrMURSM2xSVFhkWk4zZzVjbXhvVTFKT00wdDNNQ3RGYzJsc2MzSkRjRzgzVmxKSWJEZFFPVW8yTVdaRUsxbFBTMlZWTlc1TFVIWXdkakIwYjNGUGNYQktOV00zUzI1bGVXeGxVa1JqYVd4eE5EWlhUVk5WWVZCYWNYQjBVWEpRV0dwbFN5OVhlVTVQZVhKTFNYSlpVSEZsWXpOd2JUbFZlbXRCUlcxRlpXRlJjMVIxZG1wS1ZGbzBhekphVUhsd1owcGFaMVYzUFMwdFpYbElVa1EyWld0V0t6WlNZbXA0Y0VwemNtdFhVVDA5LS1iYmYwZjFiZTU3YTU4MjhmOGEzZDQ4OGYyYzJkZTBhZDk2NzYxOGVh?cid=915758588
    • https://token.onelogin.com-token-auth.com/XYXpOblYySXlVbGNyVjJWUlFYSXhSbHBZVUdkcUswbHdSbkZMTVhSTVpHVnlOMmxZTlZaVFUxbEhObWh6TjBwSGVXVlZaR04yU1V3ME9UUXhTWGhDVW1JNGNWQlBRbVpZUVVORldIcFllaXRZUm5KR1VYRnJSVXRhV0dwalpVeERTbUZvZVRSUlZHRmFOa3cwYlVnMlluWXZWV3RvU1ZFeVNGSjZWRlZaT1ZkR05YTkJORTkyYUhrMGVFSkNZbFV2YUdzMk4wdFpTRkJSWnpsd09VSnpPRWhIY1doUFoya3dkM05OUFMwdGMySk1TM1V4ZFVwTVlVNU5ZamRYUW1oQ2RWUmhRVDA5LS1iZDRjYjFhODYxYTM2MDQ3Mjk4ZjFhYzk1MDg2MmYxNjIzOTczYjU1?cid=915758588
    • https://token.onelogin.com-token-auth.com/XWlVabU0zWXZjbFZ5YWpSSlRFcE1NMWQ2VjJWMlEwcEVZbU5TYzJORldXdzRaa05hY0VaRWIwZHhTekJyYWs5aU5uTkJRMjVCV0Uxd1lrcFVaa2Q1V0hsNWQzcHhNbTV3TlZKYWRYWXZkVFJhTlVVeWFFWkJkWGhxVFRsNVVtSXdZbU5yUW5weFR6UnJXamgxTWk4M2VHTnpXVXRRYTNoYVl5ODNZWEIyZURWQmRWaFdaVTFCY1dwbFpEbGtja3hoSzNvd2FFY3hUV2RMTDJOYWFtOHlTVWR2SzBoUWRrazBabVZGUFMwdGRTOXZXVU5NYUdOdVQxcGFiMHRtUVVoNlVtRnJVVDA5LS0yMzM1MmNiOGYzOGQzOTI4MzU1YWZiZWU2NDkwMTQ4ZDQ5ZjU3YzY5?cid=915758588
    • https://token.onelogin.com-token-auth.com/XYXpOblYySXlVbGNyVjJWUlFYSXhSbHBZVUdkcUswbHdSbkZMTVhSTVpHVnlOMmxZTlZaVFUxbEhObWh6TjBwSGVXVlZaR04yU1V3ME9UUXhTWGhDVW1JNGNWQlBRbVpZUVVORldIcFllaXRZUm5KR1VYRnJSVXRhV0dwalpVeERTbUZvZVRSUlZHRmFOa3cwYlVnMlluWXZWV3RvU1ZFeVNGSjZWRlZaT1ZkR05YTkJORTkyYUhrMGVFSkNZbFV2Y
    • 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
87b6880d8e949e19e2c3a0999b60198f3735a29f9b2bf745fd77a875b6f388e4		 pdf-javascript-stream PDF /JS object 12 at offset 0x180A 611 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0012_001.js
7a1b94718f41c8ca6b82038189f3625694787bc6216760fe0b40aa9240948eb8		 pdf-javascript-stream PDF /JS object 12 at offset 0x1831 103766 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s).
font_00_cff_off0001967b.bin
9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0		 pdf-font-stream PDF embedded font (cff) at offset 0x1967B 4575 bytes

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