Malicious PDF — malware analysis report

Static analysis result for SHA-256 177a61065ebc391a…

MALICIOUS

PDF

58.2 KB Created: 2021-07-21 21:05:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 1ae7f0f1efeed306ab1fa6e1c74acbbd SHA-1: 01d9d8ad48c6bb299e509528b71df54ae721b0d0 SHA-256: 177a61065ebc391ab780b241d47a96af03fdfd3e4bba89151ff56866640908c2
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The primary purpose appears to be directing users to potentially malicious or phishing content hosted on these external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6517

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://aviseco.ro/userfiles/file/joguvimegegowizabe.pdf In PDF document text
    • https://eseninternational.com/uploads/files/30396246260.pdfIn PDF document text
    • https://everestart.com/images/stories/file/93424573356.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/sujem.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ca86d4e979---9921057256.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cea4c0088f---46145857701.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb2969c809---kumujenaworawowuvopadixa.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e0096f9e3bf---23579404746.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/brt1rfk1br6gk964h1rnlecdfn/bulizetelatofikaxajorosa.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/8c5545e21598a0076d528c28ae365f42/rotisenafeji.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/zuxidenug.pdfIn PDF document text
    • http://xn--939a66v0zjo3bcvdmrp.com/data/ckfinder/files/75689969231.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160875f490129d---forikexu.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/b402e1eb6f0ea51754d0d58b45135f30/97487025481.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b05ef007c50---lurafemakarowab.pdfIn PDF document text
    • https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/03021153ca0c92a79dfd95aafee52804/18554557301.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/bc0n7b66nlkohrg11og1d2n48e/36765600442.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c4eea804f5---gezuroxigifo.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a04d0e33ca4---10879212624.pdfIn PDF document text
    • http://7tec.ru/userfiles/files/tikukelevob.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094831a274e8---18706032132.pdfIn PDF document text
    • http://kubkao-kubpla.com/userfiles/files/wojunagigepaxud.pdfIn PDF document text
    • http://americasbestmanassas.com/uploads/files/neres.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/8d3e32bb45a12c5083376c4dfb1acd19/90767350729.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+many+beats+in+a+dotted+quaverPDF link annotation

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