Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5564a96c15488ca…

MALICIOUS

PDF

107.5 KB Created: 2018-06-12 09:41:10 -04:00
MD5: 1a5116edf3e8cc6e57e24d77a355f851 SHA-1: 67b6a84835f1c7861af558788a06ab2628390da1 SHA-256: e5564a96c15488cadcbac4ec82a1bba785d57fffd7a84e70d2a2ac9186aa779d
160 Risk Score

Malware Insights

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

The PDF file contains embedded JavaScript that automatically executes upon opening. This script displays a fake Adobe Acrobat updater prompt to the user and then attempts to submit form data to the malicious URL 'https://cardpayments.microransom.us/...'. This behavior is indicative of a phishing or credential harvesting attempt, disguised as a software update notification.

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://cardpayments.microransom.us/XWmpGeVlWb3phWGRGTUhkRFVEaHhVVXd5VmpGSFNuSXZkRzQxWkRoWWVVcEJZbXB2UVdSVmVURnFlRFJXTWpjNWQzTlROMkZoTUVSNlJtbE9Ra1o2ZHpSRU5YaENjV1VyWmpWbVFYZHdNVms1ZWtSV1MwRkRiVEl2Y0ZvNU1VMDRlVkJKZW5FeE1UaHNZbEU5TFMweVIzVnRXSEo2TDBsV1kwVmhabmhLUjBWbU9VeDNQVDA9LS05OGM4YjllODMwZTIzZmM4YmQxOWQzNGQwMzYwMWUyZDI2NDhiZWZi?cid=908498381#FDF
    • https://cardpayments.microransom.us/XTldKb1dYbGtWVWsxVkVaWVVETTNRVWc0Um1FemEzQnROakV2YnpSMGQyRm5jSEF3Y2xGdFYxVjRRWFZFYkdsMk0yTlJWbFp4VEV0SlVrMVBOM2huUW1kWFlsRkVlak50VEhFeEwybHRTMHgyV0hab09EZHlkV2hSTWxsUGRsRkVjM1EyU0d0cGFtSldTa056WWt4T1EzZElSMHgzVVN0R1Yyc3pTMnRvUXpBM1FsSnFkbUpFTnpWSmFHUkZWMWxNSzJ4ekszTnRlRE5MWTFoaWIxWkZNWFEwTVhweVRsZEJUMG92VDFKVmMwWkVZM2RFYm1VNU1XbHJVbmxLV1doT0xTMUJWMUo1T1ZoU1oyWnFTa3h0WjB0WlJtUk5SbUpCUFQwPS0tNGJlNmUwNzkxYzI5MjUzNjRlY2MzZjJlYzg1ODA0OTlmMjU1NWFhOA==?cid=908498381
    • https://cardpayments.microransom.us/XV1c5blJ6QnNURWh5WkVkblVtMVNjR2g2TjBSbGRVeDBiVlJhU0dSV1YyeHFWa3QzVkVWNlVVcDJaR0ZXWXpCak1qRndaa0l6VlM5SlFYUldNbXRWUkdwWEx6WkxSVEZHT0haR1NFOUtXa1I0ZFhORVVuSktRbHByYVhNMVVscDZWSFJUYm5STk1rSXdla3BQTDJzNGFtcEZUSGt5VjJwTGJEUjFja2t3VVdZM1VWaFliVzV2Y21SVVdWbElWRlZYVlhJNU5GSnBZVVIzYm5Cc1dtNTNUa0pxYUdaaWNHNDRkM0prT1V4NFoxSTNhV0ZrWTB0S1lXNXJVVkJpZDNwYUxTMDNVbXBKWm1Gbk5ta3pNR3B5VGpGQmFrOXZWRGxSUFQwPS0tNTRjNDQ3OTg1NDIxNzg5NWUzMTkyMjM3MWM0MmM2NDJlOGFkYmE3Nw==?cid=908498381
    • https://cardpayments.microransom.us/XVTNGNVJrd3pZVTl4VDNFd1RGZ3lLekYyVDJKWGRsUjRkVlZwVEhGMVFYZGliRzlaTTBSMVQxQXhhMk5rTDBSbE4wOHJUMnRuWVZsdmVuZFBXRFJETVVObWJEaG9iMDQ1TWxkRFpXaG9SemhSUjB0NlNreDBWMHR1V0d0TlFWbGxPRTVvVm1SdlkzWk9kbkZyY21kRmVDOXdTblpCUTBnMU9XNVVhMGt5VTBGcmFETnROVmhEVnk5VE0zcDFWM055TWpCbGMxZEZkbFYwV1VsRlptNVpPRVZzVURONFRVeEdSbTlzU0dkeWVqbDFkV1JtTkhJNVNWZzRUbHB2ZG5oWUxTMUJUMnR2VG1FMU5FZ3liVUpIVVUxQk9VdHNVV2xuUFQwPS0tM2Y4YWZmNmFlMmQ5MGJjNjY3ODcwMWFmM2I0NmFiZTNkNGJmNDY0MQ==?cid=908498381
    • 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
69add697f0b0050d1996f2a5fc59ec778d4c90c7dae416e206b5e9245a6386c7		 pdf-javascript-stream PDF /JS object 12 at offset 0x180A 605 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 1 long base64-like blob(s).
javascript_obj0012_001.js
266fa034a6dcaa7d3f4eab09c728eb92f46a8c10927243ddfd0b2bcf05ce72c1		 pdf-javascript-stream PDF /JS object 12 at offset 0x1831 103862 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved artifact contains 8 long base64-like blob(s).
font_00_cff_off000196db.bin
9340d372ad75a105fdb1627a30e96f892e0dc7d9588c0150cf06b4fa72281cc0		 pdf-font-stream PDF embedded font (cff) at offset 0x196DB 4575 bytes

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