Malicious PDF — malware analysis report

Static analysis result for SHA-256 8208db1161c3f5ca…

MALICIOUS

PDF

62.5 KB Created: 2021-08-02 17:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 3a1c1fa5ca8cabca3eadd93c6233baea SHA-1: 4dd8a23a74be9407c13ee941459db0a8921592cd SHA-256: 8208db1161c3f5cad1c72f1a170ea5a386cb3809e1a95e2d6d8a459a016b6cbf
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics confirms the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9548

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://inwebjor.ru/uplcv?utm_term=does+airtv+2+work+with+apple+tv PDF link annotation
    • https://pecsikult.hu/files/file/11771627404.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a931627a132---86511099782.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/dp72i1dps5n8ukuq234omqfgci/58352605613.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/roduvekuweza.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a972dcea7bc---xebenovido.pdfIn PDF document text
    • http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d32d3554c9---jimaresimete.pdfIn PDF document text
    • http://kfbi.ru/content/file/goseraxo.pdfIn PDF document text
    • http://hanleyresources.com/images/14731492892.pdfIn PDF document text
    • http://matchedtubes.de/userfiles/file/60465342553.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/53321871854.pdfIn PDF document text
    • http://psystems.gr/Administrator/uploads/userpics/OutPostImages/files/lobos.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/2a1itbd84nah76ic9ghp0rhsod/90372460205.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/1ae7f6f56a79802e9f03683cc4677ebb/muzimoleseretaxu.pdfIn PDF document text
    • http://msnladyboy.com/ckfinder/userfiles/files/24544260888.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f888f42162---tumixatobaturuxa.pdfIn PDF document text
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3a53b574e---kimezujasuwije.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c3a3e4e77---32050686334.pdfIn PDF document text
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/berudotonig.pdfIn PDF document text
    • http://vce34.ru/attachments/file/worejerenaj.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1609a23a0cc1b0---nowesifakulumoxubewedam.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/lesusij.pdfIn PDF document text
    • http://falerisztika.hu/tmp/90243088669.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/99d5mui0udvf564iatmpuqfc17/danil.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/10a062d9e874805e3432d95e32ab77aa/lefabiwamoz.pdfIn PDF document text

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