Malicious PDF — malware analysis report

Static analysis result for SHA-256 25405a8c696c2331…

MALICIOUS

PDF

44.2 KB Created: 2021-08-19 12:22:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: da886c2df0ce4410460a10d6dffa9f68 SHA-1: 99daba26561e5456fd5129182a0ad83ad8161e70 SHA-256: 25405a8c696c23316ee223dfe26e7af5bdac4d3c6fd5319b38925efe06cbaee4
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a single image and a click-outward action, typical of attempts to trick users into visiting attacker-controlled URLs. The numerous embedded URLs point to compromised CMS uploads and disposable hosting, further indicating a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7749

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 44 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://biorenta.lt/ckfinder/userfiles/files/lukililiregedudubuz.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/ebc1f2be977030266ab90ce711a6f0a8/gowojusiratikavanop.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/2e098a83d65596ea1951ed00cae36e60/sarujebonuxaxavurabofi.pdfIn PDF document text
    • http://avvocato-callegaro.it/public/file/99480661669.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/99289742207.pdfIn PDF document text
    • http://willbramephotography.com/ligewalakuwumapup.pdfIn PDF document text
    • https://polandpools.com/contents//files/2724426925.pdfIn PDF document text
    • http://www.petersmetalstitching.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b577ee9c1fb---40790100709.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9a63c1e85---kazijojed.pdfIn PDF document text
    • http://app8itebarandgrill.com/admin/images/file/pufalisugukamegolijifi.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ca939534510---joruwem.pdfIn PDF document text
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16072361fcc4b9---16090804460.pdfIn PDF document text
    • https://fminterativa.net/cms/plugins/ckfinder/userfiles/files/mamitupototadujagi.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/0ac39ae433aa79919dceab061d02916e/tekuwenadalejisazufag.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a44b9c40e2e---56763393210.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-7-21/20210721045213980186.pdfIn PDF document text
    • https://slezanie.eu/userfiles/file/24817050994.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/31375124935.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/mebiviz.pdfIn PDF document text
    • https://mosconi.net/userfiles/file/tetogisegarosina.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097b81bd4505---zenulowowogopatu.pdfIn PDF document text
    • http://infrabud.eu/fckpliki/file/wezagewojuwomuxa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=modo+de+producci%C3%B3n+feudalismo+caracter%C3%ADsticasPDF link annotation

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