Malicious PDF — malware analysis report

Static analysis result for SHA-256 21aa0e925f3ea592…

MALICIOUS

PDF

49.0 KB Created: 2021-09-06 17:33:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 7338520afbc446de4c7f9db1deefa434 SHA-1: f67efefe352667c18a32302402dafb2ad7f6fd03 SHA-256: 21aa0e925f3ea592555eef43ede6b3556610e8a00f3b5fea9478f84e6fcc0eaa
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document functions as a lure, presenting itself as an image to conceal clickable links. The heuristics indicate it's part of a link farm hosted on compromised CMS uploads and disposable domains, suggesting a phishing or malware distribution scheme. The embedded URLs likely lead to a second-stage payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7448

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 0 text block(s), carries a click-outward action, and is only 48 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://nomylo.ru/uplcv?utm_term=jon+ronson+psychopath+test+pdf PDF link annotation
    • http://anquocrealty.com/uploads/image/files/lanafefisefujadofis.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/fivsm9qbuconkvrd3cpjs0u450/vivimidatekemixovemufu.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611bb76283395---lukefovafumovalifivugeke.pdfIn PDF document text
    • https://suadienlanhhanoi.net/upload/files/wuruvoxokutifemanobemupes.pdfIn PDF document text
    • https://gw21.ch/uploads/userfiles/file/19034490668.pdfIn PDF document text
    • http://mea-travel.pl/userfiles/file/buvibebinarisixivir.pdfIn PDF document text
    • https://indiantalentjunction.com/milan/media/79846160197.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c982257f1a0---womazogamujureju.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d905f3b482---ditonigujogozivuv.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609acc7d97feb---wefakajomoxavero.pdfIn PDF document text
    • https://weinquartier.at/wp-content/plugins/super-forms/uploads/php/files/6b07d97e92fa1a2d0004ae4e873421b1/salaxowaduperar.pdfIn PDF document text
    • http://vimbark.sk/editor_uploads/files/5953560426.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607824ab831d9---23708226827.pdfIn PDF document text
    • https://futuresbuilder.net/dayafter/uploadimages/newsimages/file/35489157113.pdfIn PDF document text
    • http://ukrainski-rosyjski.pl/userfiles/file/nadigipibex.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/xisubusopune.pdfIn PDF document text
    • http://xn--b1amishc2fb.xn--p1ai/ckfinder/userfiles/files/poxitipumuporisigas.pdfIn PDF document text
    • http://koovappadyscb.com/ckfinder/userfiles/files/wuwewexin.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/42322381452.pdfIn PDF document text
    • https://lotusmarinevn.com/upload/files/9059118744.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/4989f5468c5a5ad1149e86f7db431e01/pobebobuxexujezulizifi.pdfIn PDF document text
    • http://yaqeen-eg.com/userfiles/file/2807616410.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/8250990a5a81fa573e68b43142e3a10d/nuvinipurito.pdfIn PDF document text
    • https://kodcomputers.ro/2664/uploads/waxaxudovutiruruw.pdfIn PDF document text

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