Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1736866b42d0f9…

MALICIOUS

PDF

47.3 KB Created: 2021-09-18 14:58:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 387b3aa450953d56f03660fc3809b19f SHA-1: 127553e9b65dd3f72e56cb8ef63f36b92ec6c439 SHA-256: 1e1736866b42d0f91c8ec0cfd4d5e40a31033a245e571b23b8a2caa7d6978be2
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to hide clickable links. Multiple heuristics indicate it's part of a link farm hosted on compromised WordPress sites, suggesting an attempt to distribute malicious content or redirect users to phishing pages. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9202

Heuristics 6

  • 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 47 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.
  • 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://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/01v0ek39rtegona73eaqe3bsi8/29943326541.pdf
    • https://granitabrasive.hu/editor_up/waxirewojunas.pdf
    • https://langumeistras.lt/i/File/57265942177.pdf
    • https://denimder.org/resimler/files/fivanos.pdf
    • https://twinscooking.nl/twins/userfiles/file/kaxukejudanobozaw.pdf
    • https://apz-arte.com/ckfinder/userfiles/files/toguretasawinifol.pdf
    • http://impex-italia.it/userfiles/files/89291648802.pdf
    • http://hugslock.com/app/webroot/img/files/guzixedewozonomunomazos.pdf
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/0340527c6273b5fee5e90260e56699f0/96672264621.pdf
    • https://giltmorestukko.hu/ckfinder/userfiles/files/80086417852.pdf
    • https://ecohort.info/userfiles/files/zixedejalesogofosobobov.pdf
    • http://shriadinathbank.com/uploads/memumelojitoba.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613711d6dd6f0---86436509782.pdf
    • http://lawfirm.vn/MINH/user_files/file/39965819018.pdf
    • http://shsuorui.com/uploadfiles/fckeditor/20210918/file/16319331624693.pdf
    • http://standardamulet.com/files/files/gixuzo.pdf
    • http://assessmentinsight.com/ckfinder/userfiles/files/vevoxamovobobuzev.pdf
    • http://crescentcarpets.com/userfiles/file/35131053523.pdf
    • http://sweed-trans.eu/ckfinder/userfiles/files/vufabatejoviraragod.pdf
    • http://www.kroonzuivel.nl/ckfinder/userfiles/files/sowinulo.pdf
    • http://michaelwilliamslaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/36817457690.pdf
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613ded298266a---54673550211.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=happymod+angry+birds+epic

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