Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37430895db7b6bf…

MALICIOUS

PDF

49.8 KB Created: 2021-06-29 12:41:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74826636d99fa07ff52215605ca5154f SHA-1: fbc3a66179ec0bcd116caa34b925bfbd5684fe50 SHA-256: b37430895db7b6bfe57808dcd048ccf5a828ae93d8d8fffc2eb2d2b2a2ada884
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it functions as a link farm. Several extracted URLs point to compromised WordPress sites, suggesting an attempt to lure users to malicious content or phishing pages. The presence of numerous links and the nature of the hosting suggest a broad distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7119

Heuristics 5

  • 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 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 http://alnoorcity.com/userfiles/file/48551336624.pdf
    • http://atraba-holding.com/userfiles/file/60365329572.pdf
    • https://www.webplease.it/wp-content/plugins/super-forms/uploads/php/files/psf9nfha3untgf754dgtvq4oko/82326048232.pdf
    • http://ucinnovation.ru/admin/ckfinder/userfiles/files/nupamuzupav.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d78caa328---72009169850.pdf
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/432990ec1c6d6d05083bb7fa2b47de65/popuvaradipibokobekuso.pdf
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2cb5a0d67---90309585867.pdf
    • https://advancedbusiness.co/wp-content/plugins/super-forms/uploads/php/files/e11f4bf1e5191495f9078a03f3c6399c/sodese.pdf
    • http://tipresentoio.it/images/file/4806391374.pdf
    • http://fotografiafrancescosomma.com/userfiles/files/49396511485.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091396023bf6---8750110150.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076eb9f93504---2425197744.pdf
    • https://eatorhours.org/e-bussiness/fckimages/file/xuvese.pdf
    • http://skiflogistics.ru/userfiles/file/gulowibesizamipetevojoned.pdf
    • https://daaeportrett.no/upload/file/kazilenajeseki.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/nokiava7f3jginh84isb3crd87/buburatikamodenutad.pdf
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/43b8dbf560955fc40748a9d4a0117862/29461382329.pdf
    • http://gleneaglehoa.org/images/file/27358997060.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c6318860ce---55448942335.pdf
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/b07f4bf2a146ee1690b6a84793653ed2/woxasexisubogolutelanuji.pdf
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/a1595d51bde75528c56f991257021eac/37808467815.pdf
    • http://aimic.com/userfiles/file/34283024047.pdf
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160b87ae5df3a0---posunogonaf.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=download+multiple+pdf+files+from+website+at+once

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