Malicious PDF — malware analysis report

Static analysis result for SHA-256 e90ecdc072d7cb25…

MALICIOUS

PDF

42.8 KB Created: 2021-09-12 09:45:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 6721a864423747ed77a03a33368f93c5 SHA-1: 9305d3d2440db2bec17a194ae538404240094df5 SHA-256: e90ecdc072d7cb250bade50f6ca19ca5bead28b0dcb9af081d59b2c35c9d6592
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of embedded JavaScript and a ML classifier flagging it as malicious further supports its malicious intent. The ClamAV detection as 'Pdf.Phishing.Trojan' confirms its classification as a phishing-related threat.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7092

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 42 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://essiac.cz/UserFiles/file/bidezezemujiloribonodu.pdf In PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613b0d9f394a3---zukadefivele.pdfIn PDF document text
    • http://sun-marche.com/app/webroot/js/ckfinder/userfiles/files/bivimavi.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f9a2e7fbe---18217384749.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/tokolapipaforiwisitonuw.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/161317ab1ef678---65077746666.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/96971614603.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/391a96e9bbefb4360335c8ecdc0d068a/fabajovedusawe.pdfIn PDF document text
    • http://pogotowienaukowe.com/Upload/file/45807369125.pdfIn PDF document text
    • http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139b7c0e191f---tulajapaxukuzepog.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/18003919268.pdfIn PDF document text
    • http://julianowka.pl/ckfinder/userfiles/files/xonetewiv.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/66180157436.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210912_865218E3306C200C.pdfIn PDF document text
    • http://landonintergroup.com/ckfinder/userfiles/files/dinom.pdfIn PDF document text
    • http://4998horo.gmmwireless.com/contents/files/5291163567.pdfIn PDF document text
    • http://milkexim.ru/imgeditor/file/boxuposidefolixoxezimupen.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/76657191301.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/34997614138.pdfIn PDF document text
    • http://aostavet.it/userfiles/files/99757409914.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/87945891528.pdfIn PDF document text
    • http://abwjefferson.com/uploads/files/59977267868.pdfIn PDF document text
    • http://geometrarontani.it/userfiles/files/faguki.pdfIn PDF document text
    • http://htk2.altrodesign.eu/ckfinder/userfiles/files/8900809257.pdfIn PDF document text
    • http://joinsocialbubble.com/cake/beta/userfiles/file/nobowebile.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=emulator+android+bestPDF link annotation

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