Malicious PDF — malware analysis report

Static analysis result for SHA-256 c03cc38974c20055…

MALICIOUS

PDF

62.3 KB Created: 2021-09-07 07:12:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0519da423b9ab5e82bdd2663a842e641 SHA-1: eab98b23df8e3f0f7df6824f4568786a4fe60dec SHA-256: c03cc38974c20055b48ff136a163c59cc3c4674b7cd3c92536d6cb3e53f7c78e
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains a link farm pointing to numerous PDFs hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The document body is unreadable, but the heuristics indicate a deliberate attempt to host malicious content on potentially compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7797

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 https://aliencosmicexpo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0a8847b14---povavigaxezenudes.pdf In PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/e1qivfr0sugiksfd3auqdlakta/lerezefowemefunozerosuw.pdfIn PDF document text
    • http://math-talk.kr/wp-content/plugins/super-forms/uploads/php/files/hps23r92shparu9mvar2ld1lko/pidelugojo.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608493c85c345---74878914101.pdfIn PDF document text
    • http://berbun.com/user_img/file/kobomasawiramewixumepoj.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/16074d7d1542f8---xopepamojipawa.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/28314311117.pdfIn PDF document text
    • https://jurad.eu/files/file/timogosef.pdfIn PDF document text
    • http://kelvista.lt/images/files/34859133620.pdfIn PDF document text
    • http://libron.pl/fckupload/assets/file/46740277020.pdfIn PDF document text
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161306d49aa5d7---40800010274.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/pokijivusizebafuva.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160e09e8e5cf95---kudunixidinabategidil.pdfIn PDF document text
    • https://www.reparaciondebomba.com.ar/wp-content/plugins/super-forms/uploads/php/files/jelfju1rpkmgbigq1bp0gampr4/vonewoguwunujirunowa.pdfIn PDF document text
    • http://kirilmazbardak.com/userfiles/file/jowanivoniroxanaxodedo.pdfIn PDF document text
    • https://www.tristar-technology.com/ckfinder/userfiles/files/mubagepana.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d73d070425---56441328067.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/c258e3b0cd5a37e7762f94b72a129862/dulubivopifokipafu.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/19267538140.pdfIn PDF document text
    • http://wienbildarchiv.com/upload_files/files/12355185888.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160d833acb9cfc---72131474870.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/6f9ade159bac549e7c3799059c3e89a5/29286781028.pdfIn PDF document text
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/604a69ee19dd83cfff9e965be82688c8/nekomovatiderefakozun.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d0b15c2ba25---46223108039.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607815d545732---2299997239.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/4720196475.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/56d3200ba85be1a56863c916e27498a6/sazuvirawut.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=odd+one+out+examples+pdfPDF link annotation