Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a5ad6255f6b8088…

MALICIOUS

PDF

51.6 KB Created: 2021-09-25 06:03:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 053496861804f3c5ebfd9f5ff8ad3eb4 SHA-1: a15aee4cd1a19514ab705fb8d92c087e927cd5ba SHA-256: 7a5ad6255f6b8088febfd81596b0b2afa516d26f390b95c34623752e3cd6f57e
182 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and is identified as a phishing lure by multiple heuristics. It presents a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8752

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 51 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://miass.realxenon.ru/uploads/files/renagirosutezulijemadarob.pdf In PDF document text
    • http://aedjtjdshbf.pretty-match.com/upload/files/daniwarasipafo.pdfIn PDF document text
    • http://nawaress.com/webroot/js/ckfinder/userfiles/files/zewifo.pdfIn PDF document text
    • http://www.saveurspoitoucharentes.com/admin/ckfinder/userfiles/files/lunefujofuwajopalos.pdfIn PDF document text
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613eb633aa690---xofibizenakulifut.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/16671911880.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614297d0b4951---madomanonovekixom.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/25430431027.pdfIn PDF document text
    • https://samngaimarble.com/html_upload/file/85959475220.pdfIn PDF document text
    • http://akwarella.pl/user_uploads/file/37912234219.pdfIn PDF document text
    • https://thehouseproduction.net/file/gufemajogaf.pdfIn PDF document text
    • https://ski-valloire.com/ckfinder/userfiles/files/puliwobevudurisivaxa.pdfIn PDF document text
    • http://laarakkers.com/ckfinder/userfiles/files/gugikan.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c0dd49c154---34700724971.pdfIn PDF document text
    • http://weddingdove.tw/uploads/files/202109230512129951.pdfIn PDF document text
    • http://sinching.com/uploadpic/files/202109211828098882.pdfIn PDF document text
    • https://mtmhomeschool4art.com/mycms/uploadedimages/editorUploadedImages/file/72799246769.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/kokukojefufe.pdfIn PDF document text
    • https://dimensioninteractive.com/WYSIWYGImage/file/26029256794.pdfIn PDF document text
    • http://wgadget.com/file_media/file_image/file/likigili.pdfIn PDF document text
    • http://muasamhangmy.com/ckfinder/userfiles/files/63199936615.pdfIn PDF document text
    • http://medtravel.pro/images/hand_uploaded/files/48550378003.pdfIn PDF document text
    • http://acm-medicali.it/userfiles/files/linovebejamitalosos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=art+of+war+mod+apk+unlimited+gold+and+gems+latest+versionPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ae8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE8B 11164 bytes
SHA-256: e47364e49c5a851851ddf9ad04e66d28d0d33a71d8b07136d45705f7f6e38c18

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