Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a4a1c0d34bba170…

MALICIOUS

PDF

45.5 KB Created: 2021-09-28 01:41:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: d4d273b37f4f6f604f5d23bbf68f9755 SHA-1: 358e8e64f7d49995eaa221820ba3e6fd1725bdfc SHA-256: 4a4a1c0d34bba1707a9c479cc1487cf29d2fdd21976c81164ff190a85219ebcf
92 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and is structured as an image-only document with a click-outward action, a common technique for phishing lures. The document body is heavily obfuscated, but the heuristics indicate it's designed to present a screenshot that hides a clickable button. This button likely leads to one of the numerous external URLs found within the document, which are often used to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7423

Heuristics 5

  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 45 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://nutrishop.in/ci/userfiles/files/wenovuwizuf.pdf In PDF document text
    • http://constantcontinuity.com/membership/data/files/ropamuj.pdfIn PDF document text
    • http://elsekmont.eu/userfiles/file/rusifarijizupo.pdfIn PDF document text
    • http://isagenixmakessense.com/ckfinder/userfiles/files/vuvizarurabafukawelev.pdfIn PDF document text
    • https://360clothing.in/home/www360cl/public_html/uploads/images/files/wamibuli.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/bamotepuzorexutamor.pdfIn PDF document text
    • http://ashokarefrigeration.com/userfiles/file/96126361170.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/wowotisapepat.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/50871108102.pdfIn PDF document text
    • http://zespolbahamas.pl/zdjecia/file/12054904556.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/de85444031b53a0462a08f5cbd29aef3/tanifixuxaberewinoz.pdfIn PDF document text
    • http://gotween.com/userfiles/file///varexefipa.pdfIn PDF document text
    • http://cpviettin.com/upload/files/36789421784.pdfIn PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16151098f102cd---92998674557.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/93654617730.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/37547970446.pdfIn PDF document text
    • http://bukharajohnscreek.com/sites/default/files/file/58187478447.pdfIn PDF document text
    • http://viorina-deko.com/images/file/dijejareluxarasare.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/xikoz.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021091913585173499.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/34051157413.pdfIn PDF document text
    • http://vincitydata.com/uploads/ckfinder/files/36639474724.pdfIn PDF document text
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/lekoxu.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/53291357876.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=best+city+making+games+androidPDF link annotation

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