Malicious PDF — malware analysis report

Static analysis result for SHA-256 2760cd2af82eab04…

MALICIOUS

PDF

58.6 KB Created: 2021-09-16 06:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d9a35a9b2a4fb1e19a029cf7a10d59eb SHA-1: b8d5c1ca8d0c29c340496263ba69798e7c9288e6 SHA-256: 2760cd2af82eab046618bc3ff56650d6bdffaf418ce1feb32560ab3a676a7d7e
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The presence of embedded URLs and link farms indicates an attempt to redirect users to malicious content, likely for downloading further payloads or phishing for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7666

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
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://ketchas.ru/uplcv?utm_term=apk+san+andreas+gta
    • http://autosoftware.company/autoresponders_images/files/77739194290.pdf
    • http://juha.be/_files/file/pibowibu.pdf
    • https://somos.co/dleyes/admin/fotos/file/69185825921.pdf
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/todaje.pdf
    • http://e-sportis.com/images/upload/47511255041.pdf
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613930731ff6e---75256323440.pdf
    • http://hiroshima-teishaku.com/userfiles/file/movekalepo.pdf
    • http://indianmailbox.com/assets/images/userfiles/files/6714408231.pdf
    • https://gionggiacam.com/ckfinder/userfiles/files/91862732682.pdf
    • http://bjavc.com/filespath/files/20210906182913.pdf
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1613f06f0d61a3---lemapunupetuxilokim.pdf
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/guxenepawepital.pdf
    • http://mebelhotel.ru/userfiles/files/36721344280.pdf
    • http://kolbiko.com/images/uploads/file/pagobubifokigepagenox.pdf
    • http://jingyilin.org/uploads/file/ziribilubogadepagiv.pdf
    • http://newo.ru/files/files/890044555.pdf
    • http://weorderfood.com/uploads/files/92710408415.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161353fded0d86---velapibekukusi.pdf
    • https://agronlogistics.com/userfiles/files/38069151628.pdf
    • http://rjbmachinery.com/d/files/datidazagarinetedupibuxa.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/i2r06cc5kdn4de9mq0sfqjpri6/gerurixogitukiv.pdf
    • http://bagliodeimille.it/userfiles/files/nutuguwidowazul.pdf
    • http://wdnederland.nl/file/xamubigot.pdf
    • http://pm-ural.com/uploads/files/91788518804.pdf

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