Malicious PDF — malware analysis report

Static analysis result for SHA-256 52512a25f3bd68d6…

MALICIOUS

PDF

41.8 KB Created: 2021-09-30 12:56:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: f0911b343f87e2888dd4cb030a48da47 SHA-1: 17ee4f8c8cb65be122b2ab2178f1a65cbed075a3 SHA-256: 52512a25f3bd68d6da1b499d7581c320b92626131c8583af37ccd2a62f8e8332
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be part of a link farm designed to obscure the ultimate destination. Several heuristics indicate that these links are hosted on compromised CMS uploads or disposable domains, suggesting a phishing or malware distribution scheme. ClamAV detection further confirms the malicious nature of the PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7814

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 https://philabc.ru/uplcv?utm_term=ros+cheat+android+no+root PDF link annotation
    • http://vektor-bezpeki.com/userfiles/files/99949550686.pdfIn PDF document text
    • http://erpos.sk/data/files/5467833735.pdfIn PDF document text
    • http://isotope3.pm-ural.com/uploads/files/84701130946.pdfIn PDF document text
    • http://jedzenie365.pl/ckfinder/userfiles/files/97586175989.pdfIn PDF document text
    • https://factorysales.com/userfiles/files/93270049892.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/35698441430.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/lanaru.pdfIn PDF document text
    • https://dobre-akce.cz/media/files/file/40421956648.pdfIn PDF document text
    • https://moyaexpresss.com/ckfinder/userfiles/files/29557270949.pdfIn PDF document text
    • http://www.civilhospitalpalampur.in/img/uploads/files/27817785672.pdfIn PDF document text
    • http://hhsmelt.com/upload/files/69202004789.pdfIn PDF document text
    • https://hotelcorona.ro/files/sivagadazitidiwawumexuf.pdfIn PDF document text
    • http://agisma.ru/files/pages/files/57323170335.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/sofagamagomewisinuwiz.pdfIn PDF document text
    • https://produktybhp.pl/pliki_user/File/bavivar.pdfIn PDF document text
    • http://daydeothe.vn/rich_editor/file/mukexepesepudine.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614263b463dff---mukodesuroboxidanu.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615394bdda1f4---wifil.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/4btnio884ptj198u0mph12g5i8/24429811121.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/e596e7d83ac73d5772bd50c2d63700c6/tekod.pdfIn PDF document text
    • http://perles-del-beya.com/userfiles/file/17400221423.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/kogolisedunijotelaj.pdfIn PDF document text

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