Malicious PDF — malware analysis report

Static analysis result for SHA-256 2170a2d49ae67c3e…

MALICIOUS

PDF

62.5 KB Created: 2021-09-24 10:56:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1c5681fd35e47cd18c5913351f30e9ab SHA-1: 4d57ed0cb4ecaf630728f43ec59784228ef6518c SHA-256: 2170a2d49ae67c3ec66df3d875cf17807770e48ff35cd5668553471ce2a00a34
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, with numerous URLs pointing to potentially compromised websites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to distribute malicious content or phish for credentials. The presence of multiple URLs, some hosted on compromised CMS uploads, reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4598

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/pazokufad.pdf In PDF document text
    • http://autothudo.vn/upload/fck/file/93587473133.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614090f23da0a---bumevunemederajimolere.pdfIn PDF document text
    • http://seanbittinger.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/morewitegevafij.pdfIn PDF document text
    • http://bong-dem-long.org/upload/editor/files/levogipefutetumipe.pdfIn PDF document text
    • https://mobilaide.com/upload/editor/file/43975872624.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614b26b72da6f---74740779686.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16147a5131c73f---zupulalosuv.pdfIn PDF document text
    • http://stamforgtechnologies.com/uploads/16104633041.pdfIn PDF document text
    • https://hoakhanh.vn/uploads/image/files/fesaniwulibijilimom.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202109091912081981.pdfIn PDF document text
    • https://sanghvicranes.com/staging/media/51786012091.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/16133ca818f7d0---55932590312.pdfIn PDF document text
    • http://ticketsperiodico.com/galeria/files/lutijenebuja.pdfIn PDF document text
    • http://amunt.madteam.net/ckfinder/userfiles/files/61494130510.pdfIn PDF document text
    • https://libertyrealestate.in/ckfinder/userfiles/files/96064393698.pdfIn PDF document text
    • https://abcspain.tansis.com/userfiles/file/suxujofadupufowolet.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16133ca761e463---mavonejipedaxejidoge.pdfIn PDF document text
    • http://deeringbayrealestate.com/userfiles/files/segowotosufavelorad.pdfIn PDF document text
    • http://www.ximangsongthao.com/app/webroot/uploads/files/konejidazorog.pdfIn PDF document text
    • http://osoboebludo.com/ckfinder/userfiles/files/80756648669.pdfIn PDF document text
    • http://ekhoron21.mn/uploads/files/dapozeradonokujuboj.pdfIn PDF document text
    • http://americansemitruckparts.com/d/files/85774304656.pdfIn PDF document text
    • http://tincorner.vn/uploads/files/21363311230.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=the+sims+4+pc+apkPDF link annotation

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