Malicious PDF — malware analysis report

Static analysis result for SHA-256 37ba7da6ef0cd0b7…

MALICIOUS

PDF

39.5 KB Created: 2021-09-23 13:07:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ff5030d7ee07a92dabf512c1e32d86d0 SHA-1: 988540adc3db42e0c5a30000c09d31f5b5975534 SHA-256: 37ba7da6ef0cd0b7892ebbe8029d60f768b3b76abe18b5befea218c017ea121f
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as an image-only document with an action trigger, typical of a phishing lure. It presents a link farm pointing to various PDF files hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9758

Heuristics 6

  • 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 39 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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 http://gleb777.com/fck_upload/file/92566722059.pdf
    • http://www.galiantsolutions.com/emailimages/file/kawum.pdf
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/227pr0dje9q9cvvkqs78ljc5d2/53376325096.pdf
    • http://adwokaci-pila.pl/userfiles/file/77165744196.pdf
    • http://jobsandhi.com/uploaded_files/userfiles/files/20558256236.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1614c3521a1c41---78364176480.pdf
    • https://educhina.mn/editor/files/49768596918.pdf
    • https://blsautomation.com/ckfinder/userfiles/files/43296317072.pdf
    • http://fulns.com/uploadfile/fckedit/file/1632305091TCg5.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f3122728b9---kutisojafamizin.pdf
    • https://ibexquimica.com.br/ckfinder/userfiles/files/xedomipusozikufamazefof.pdf
    • http://6nergy.fr/6nergy/sites/default/user/file/41795988276.pdf
    • https://bharatiyabhashaparishad.org/ckfinder/userfiles/files/85738810863.pdf
    • http://4998horo.gmmwireless.com/contents/files/gegesemejilamazewid.pdf
    • http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/rosibum.pdf
    • https://livre-d-art.com/ckfinder/userfiles/files/zeroberodofibagagomevif.pdf
    • http://website-design-company.in/dev3/damodar/ckfinder/core/connector/php/userfiles/files/fagidazefudedaduduw.pdf
    • https://vhssirimpanam.org/ckfinder/userfiles/files/62885686212.pdf
    • http://belgium-ex.com/images/blog/file/
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=cara+check+telco+set+android

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