Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c5deb2fcc4e5ced…

MALICIOUS

PDF

71.9 KB Created: 2021-08-10 08:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6a341a0dcf5ba87a4547204497694c56 SHA-1: 469a2948bfe0f95c9bece78c5b65ad9c30f14074 SHA-256: 8c5deb2fcc4e5ced98d7ce77f90689368d04b52e0094d3c256c7451bc2f61025
154 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a machine learning classifier and ClamAV, which identified it as a phishing trojan. The file functions as a link farm, containing numerous URLs pointing to compromised WordPress sites, likely intended to lure users into downloading further malicious content or visiting phishing pages. The presence of external URIs and compromised CMS upload links indicates a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9374

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://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ee91a0c52---pazomazezoxetorikatotumup.pdf In PDF document text
    • https://digbijoynath.in/iisc/ckfinder/uploads/userfiles/files/mavawiwatewi.pdfIn PDF document text
    • http://podlahyadvere.sk/editor_uploads/system/files/88481625972.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/01dd65344417e1c9955c996807700797/venomipasuloke.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/bf046c4e51aff27e5695bdd4e9364949/reparopelixevesoluv.pdfIn PDF document text
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/0a386903971b420e84a8d7124ec026d1/78907189309.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/16071a31834439---jaronapuriwuxutaburovu.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a85f7c4a963---93279642150.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070bfcd0d1be---54663416535.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16077a1da0185c---fosada.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/nutorewa.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081766439705---gomeginaposakidopotaroz.pdfIn PDF document text
    • http://www.specemc.ru/upload/files/18145638438.pdfIn PDF document text
    • https://madopin.com/calisma2/files/uploads/98541672291.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/79341143497.pdfIn PDF document text
    • http://strategie-online.net/catalogue_dynamique/file/46739301128.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/dipufiwuwanejoxinerigek.pdfIn PDF document text
    • https://mszukam.pl/dat//file/soketizigapemalopaja.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/590a62bb34953e970982194a033e1fc9/1359134507.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=witcher+3+sukkubus+mutagenPDF link annotation

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