Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fccb71d62cea26e…

MALICIOUS

PDF

69.8 KB Created: 2021-09-03 13:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: dea6e346045c1cf915e500c0ec3d98ff SHA-1: 97f6dc532b0013d968792275099518b290c974e9 SHA-256: 2fccb71d62cea26eca821aaa2fde9fe4f757ee724cb8952a6b82acff9397fa25
154 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery. The document's structure and embedded URLs align with techniques used to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7775

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=conectores+en+ingles+y+espa%C3%B1ol+pdf PDF link annotation
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160e54b5711822---zelozuvojozeleruwanijan.pdfIn PDF document text
    • https://mk-promotions.com/ckfinder/userfiles/files/mivafirazupi.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/gipureleki.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1611716a3991df---rededotevew.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210731222417352.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/6493e529d88f67b989550c6ba1fb50d7/67161929618.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b62327ba7da---tudadu.pdfIn PDF document text
    • https://dacola.com/upload/files/98733634312.pdfIn PDF document text
    • https://www.esicm-old.org/admin/lib/ckfinder/userfiles/files/toribo.pdfIn PDF document text
    • https://bitree.com/ckfinder/userfiles/files/welomofotuxilapitarutoluz.pdfIn PDF document text
    • https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/tp17nbnjtsb8s5q7tn5khn6570/kivukadibilunaw.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/muzifujupimawatufemofuto.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/77355232889.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607574afa1c03---sajujalilezenilelas.pdfIn PDF document text
    • http://sy-smile.com/upload/files/bapof.pdfIn PDF document text
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160fcd57e0285d---siwifazivavazelutopusa.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/54621970b4ba506dfea0954321415f7c/pedodafufir.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc90f40864---62189707629.pdfIn PDF document text
    • https://rizecanreklam.com/images/file/pepetapezanolabaloveke.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/f47178bae96fefad5a237b92c7602794/ziwogevedujetupulagid.pdfIn PDF document text
    • https://jhservice.net/imagenes/galeria/files/xavoxolazadebo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 20428 bytes
SHA-256: 7a35ae7e921a9201288356abe801ee2380abf23afe675f88c8f2452d108419e3

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