Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c5ce71bbcfe9f0a…

MALICIOUS

PDF

92.6 KB Created: 2021-08-07 03:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6ed199e89e12a07154ee6d16b728c5ce SHA-1: cfd5e036e9c781a9f1b965edbeb960afc1cdeeb2 SHA-256: 5c5ce71bbcfe9f0a8ddc0782a00dc872dc81ab7b0e75f01b3664518ac1d73708
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely serve as a distribution point for phishing content or further malware stages. No scripts were extracted, but the PDF structure and URL patterns are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8579

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://agendaalzheimer.org/files/galeria/files/20299685575.pdf In PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8beaaf1209---49087484223.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/212dd50ea7b14ef6c385da0c701bd0dd/75142775090.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021071611063673499.pdfIn PDF document text
    • http://rufullthrottle.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075daae53112---2436390747.pdfIn PDF document text
    • http://caramelitos.sk/files/37397191017.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b988bfd3e---43903594203.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/lavupe.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/sotuporazikegekepomukok.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7337b2d11---39974754122.pdfIn PDF document text
    • https://spacio.hk/attachment/file/92062104343.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210620_162102.pdfIn PDF document text
    • http://poltinka.ru/userfiles/file/gulolutapiguwot.pdfIn PDF document text
    • http://gruppocreta.com/userfiles/files/68328261023.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be4b258050e---xelabidevulafusawoxit.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/16282829178809.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/lisaxiguzupogur.pdfIn PDF document text
    • http://www.verneteco.com/ckfinder/userfiles/files/93677467882.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607935eb0c0f2---jenadulivexiduwuvivolux.pdfIn PDF document text
    • https://termoformat.md/img/files/jarewubitamu.pdfIn PDF document text
    • http://greatwalledmond.com/ckfinder/userfiles/files/fitabirurisaloxe.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/37724cd44f75410ae6dd6dfd06376bd9/82372802931.pdfIn PDF document text
    • http://siripanyalamphun.com/user_img/files/jivureduforofufu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=enfermedades+asociadas+con+la+desnutricionPDF link annotation

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