PDF malware analysis — malicious · 9e9fd271b10a9f12

MALICIOUS

PDF

107.4 KB Created: 2018-06-12 09:41:10 -04:00

MD5: e31600be03d0ca53ecc03f80f542c827 SHA-1: aad438070893dac3f379ab663469d3fbb5e74de3 SHA-256: 9e9fd271b10a9f12b140ddf3376170b0d6042a0065f0e4a00b3802bddf0b7a9b

200 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document leverages embedded JavaScript to present a deceptive 'Adobe Acrobat Updater' prompt to the user. The script automatically attempts to submit form data to a suspicious URL, which is likely intended to download and execute a second-stage payload. The use of JavaScript for this lure and the suspicious URL strongly indicate a malicious intent to compromise the user's system.

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/XV2tad1kzbHFZbk00U1ZBMVpqTkJORzh2TUdkWU1HVlRRMG9yY1dOR2VXRk5jakp2UTAxSWMwNXFXWGhJUWlzMU1sSlhTVEJLWWpoNWJIZ3hVelJZUzBwMVRGTnRRMGxyVFdzeVFqUk5XRTVxTWtoU01uTlVSWG8wZFhwdE1tbHFRM0I0U0daWk5ucEZaVVU5TFMxRFJHbFJaekZyUWpONmN5dFlNMHhSWmt4T1JYTlJQVDA9LS02ZDZiZDk5MmNmMTQ1NzA3ZGFkYTgwYWIzMGM2MTU2ODFiYTgyYjI5?cid=909819248#FDF
- https://token.onelogin.com-token-auth.com/XTURWeE5Ha3lRelkyTmk5WGVrdzBRMEprWm5JeGQycEhNMnh1ZG5vdmVXZHhiblZHT0VZM1IwbGxXbmxRVURRMWFEVmhValo1WkVOc05tUmtSMFpLWWpsck5taEpTemN5YjJ3dmEyVldRbW93WTBwSlF6aHNORlJvYldoUFMyTXZNblpFWVhwcEwwMVFXRzlKWnpCcVRWZ3haMDV5WlU5YU1teG1iMDlaUkVwR2VGSjFMMGQyZW5VeE1UTjRZVU5EYXpOWE4zWkxXR1JWZEUxR2NHMXBNRVZHVmt4MVFsUmtkRk5WUFMwdFVHMXljV2c1Y0c0M2NWZFNhMXBMV1Rrd1VuUllRVDA5LS1jNjY2NTYyMmY2NDliM2JhMzg2YzJhNGZhNDY2MzE3ZjkxZmFlMGE2?cid=909819248
- https://token.onelogin.com-token-auth.com/XZFU1RVRrWjNaRkY0TjBKNk1tTlhkVEpDZUU4eWVraE5SMWswVEdOUlltUlhNR2RXTUZvd2REZzBSa1JIWnpFMFdreGhWblpXTDBrMVVFdDZNRE5xVVVvdmJuZHdlVTByUlZGaFVpOU1jRFZQV0RKRlpHUXhNR1ZHY1M4M1FuSnpkV1ZEUjBKRU1VeFpkMHBPYVhoSVZYcE9WMWRXYjNkd2FVZDBlblJ0VWxaNVdIZDZlaXRRVEc1dlFsZFJXR1UwTW1JMVpqUXpWeXMzUVZwclYwZFlhMGgzYW5GcGJEY3JORGR2UFMwdE1tVjNaV0YwU0Rad1JDczVabGhCYTB0c1JEQjBRVDA5LS1lZGRjZDUwN2Y2NDU1YmMzYTVmZTYwNDUyMmYzY2VjM2M4MjEyOGFm?cid=909819248
- https://token.onelogin.com-token-auth.com/XV0hOTU9IaDJRMkp6TlVOSVdtMXRUa3R6Y0dSclNreHRPVmxEWmtobVNHbFJaMWxRT1dreFRUVjFSa1JWZEdabU5YbDRkMHBoSzNrclpuWkRTMmx2VGtWaU5uWTFRVGRCWTJkcGJqVnFjalkzWnpsV09DOUlVa1p5VDI1WmIwNDFWV1F6YW1wek1rSjFlVE5WU1doWlZVOWpWMHhyY1ZOa0wwOUJZa3RWVFhCU2VuVjZhekk1Wlc1elYwbDBiMmR6WWpoM2IxWkhXVE5sUXpWTlpGbEdNR1JEVDFCaFlYYzBaekZWUFMwdFZXMXNZa3BXYml0TmVsUmpLemhCSzJoS1dXd3laejA5LS1kY2I0NjZhY2Y5ODk4MjY1MmQ1NjI1MzIzNDIzNmQ2YTU3Y2FmMTZm?cid=909819248
- https://token.onelogin.com-token-auth.com/XTURWeE5Ha3lRelkyTmk5WGVrdzBRMEprWm5JeGQycEhNMnh1ZG5vdmVXZHhiblZHT0VZM1IwbGxXbmxRVURRMWFEVmhValo1WkVOc05tUmtSMFpLWWpsck5taEpTemN5YjJ3dmEyVldRbW93WTBwSlF6aHNORlJvYldoUFMyTXZNblpFWVhwcEwwMVFXRzlKWnpCcVRWZ3haMDV5WlU5YU1teG1iMDlaUkVwR2VGSjFMMGQyZW5VeE1UTjRZVU5EY
- 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.

Filename	Kind	Source	Size
`javascript_obj0012_000.js` `0f504255ce0cb1f089dc5d87e0866d05dddc0e21aef30079b40e520948cdfddf`	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` `2e6c9886312fc94a1b454c1dbf4300941f91c345f83c05ce7861467b00ecdd74`	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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