PDF malware analysis — malicious · 9080b564fe1ff47c

MALICIOUS

PDF

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

MD5: 63493b83e0c2b9b13437db3fc83c61b6 SHA-1: af6843d7b70a674beaf8f2a203d44f2523144cd0 SHA-256: 9080b564fe1ff47cc8f2b7dd2a44e52f0b7085e3df01210e153c01ab877ea815

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 attempts to trick the user into clicking 'OK', which then triggers a form submission to a suspicious URL. This behavior is indicative of a phishing or malware delivery attempt, likely using a social engineering lure to 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://na01.safelinks.protection.outlook.com.url.protected-forms.com/XUVZkNE1YaElhVXhpU21WeWRYTlhVM0JNZFhGVWRVMXdRVk4zUjB4M2JtczJjMmRwY3pOVWF6RkpaamhqY0VWYWFGTXZSMlIyV1V0cmNrSmFhMWhEZVdORE1qSm5kVWMxVWtGcmRVSlFjVGx5Y1dKb1drNXdVa0p2TTJoVWRtRkJUa05FUjFGaVduVnJjMFU5TFMxVmJIcE5PRmhSVlhGMlNFUldSRGROYzBrM1psQm5QVDA9LS05NDFiNjVlOTA3ZjJiNjNjMjcxNDA0YzY1Zjk2OGZiYjNhZjA4ZWNj?cid=892349016#FDF
- https://na01.safelinks.protection.outlook.com.url.protected-forms.com/XWW1waWJFUk9SbFpMY0ZJNFYzWXhSVmxWU0U1blppdFBjRlZqZW1GcWJFazBaRTFZWkRsSU1VeGxaWGQxVGpWRWJtZzJORFZsYzFGMFZHaHFWbTlOWlRRNGVVaElTbTVyYlhkbFRVVlRla3d6VUVWWVF5OUNPR2M1U2pSVFVUSklZbFZUT0dSQlNGZHBOV2hIYWtGTmRVdzBMMEZNZDNGdVZrMW1XWEZLUVdwUVlrTlVZbGhOVUhaaE1XMU5RMlJUVlRSYUwwdEpXSEpXY3l0d2JVRkJWMGxwU25wYVVWRjZTVGhCUFMwdE9DOUlTMUp4TUU1MmNFMUlNVUppUzBVNWVUUldRVDA5LS1jMzJkZjY4NjFkNzRiYmIzYWQxYzQxNmM4ZDVkYzZhYWZlZDhhMzA4?cid=892349016
- https://na01.safelinks.protection.outlook.com.url.protected-forms.com/XYmk5cFNuZFFjMUp2ZFd4R1NGRTROVUZZYzBOa01Ga3ljV2RzVlRKVk5XOTFTREZxVGk5QlRERndSa1YzYW5SRFNGWk5ZV2szWW1FMVUzbHBXalZKV0ZKVk1VdDRVVmN5UkhWVVRFcFNVVEpYTm5VelVEWkhSVmRoZUU0MFZUUkNWVGx6ZGs1elRFWkVhR292YkVKWFMwWjZSbTVIU0RsbFVXZGFkMGROU3pkc2MydGxlVEJQVDJOTlkyZDRhRFYzY0hWVlJ6QTNObTFKUmxkR1EyZFpVMGxEVDJzMFkzRkRRbTlWUFMwdFptSm9hSFZXVW1sUlpUQjBhelF2WW5KUmNuQTRVVDA5LS1kZTc3ZTEwZDcwY2ExOTlkNTVkZmIxYjk4NmFlNTU4ZGYxNThlNDA4?cid=892349016
- https://na01.safelinks.protection.outlook.com.url.protected-forms.com/XYUZCWU9XTmhRbXh2YzFSUmNsbzVTamRUVWtOVVdWWXJiMGt4Vnl0WmRGQlpZV3hoTXlzeVQwWjFRV3RUU1V4V05URllVWEZQZWpKV1lucHVlVGxxTDBONldrWnJjQzkzTUUxUWFFNVdjVmRTZDJkd09VaEVUMWMzZWpaU2MycFFlVE5xYkVSMmJGSnhaVTVLVVZSMmRYUmhkbmN4WkZFeU5XOXplVEl3TDB4NlNFVnhURXhsYmxaQlRXa3hRalZKTkRORlZtSXljek5aYkdONVRERmFlRk4zVmt4bGNubFNVRWc0UFMwdE9WQjZXVU42YW1vclMzSTJhRUZYWTJWb2NITm5VVDA5LS0yMDc1ZmMxYTJiYzJkZDBjNDVlNGUzN2UyNDY0MzFhNmZlOGM2ZTA5?cid=892349016
- https://na01.safelinks.protection.outlook.com.url.protected-forms.com/XWW1waWJFUk9SbFpMY0ZJNFYzWXhSVmxWU0U1blppdFBjRlZqZW1GcWJFazBaRTFZWkRsSU1VeGxaWGQxVGpWRWJtZzJORFZsYzFGMFZHaHFWbTlOWlRRNGVVaElTbTVyYlhkbFRVVlRla3d6VUVWWVF5OUNPR2M1U2pSVFVUSklZbFZUT0dSQlNGZHBOV2hIYWtGTmRVdzBMMEZNZDNGdVZrMW1XWEZLUVdwU
- 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` `68f544a75ff7b7d81044d1a563a2520b7d68490b2811aa406e0d338a12e845a9`	pdf-javascript-stream	PDF /JS object 12 at offset 0x180A	639 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 1 long base64-like blob(s).
`javascript_obj0012_001.js` `416097b855a7d42d7d283e8cb099ba5a3f5db203626f74ce3f7c59ffbcf41e3d`	pdf-javascript-stream	PDF /JS object 12 at offset 0x1831	103878 bytes
Detection ClamAV: No threats found Obfuscation or payload: likely Carved artifact contains 8 long base64-like blob(s).
`font_00_cff_off000196eb.bin` `9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0`	pdf-font-stream	PDF embedded font (cff) at offset 0x196EB	4575 bytes

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