Malicious PDF — malware analysis report

Static analysis result for SHA-256 a802a806c72fbad4…

MALICIOUS

PDF

62.6 KB Created: 2021-05-29 15:45:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 71fac0c3edf8959767bb8f676d414384 SHA-1: 9803bc749d0b86064995cb9e5088ea92785a4ff9 SHA-256: a802a806c72fbad4fdfddd7d9329afbe2270bff2532a43530e16943a942ef6e3
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating it is likely a phishing or trojan delivery mechanism. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories, suggesting an attempt to lure users to malicious content hosted on these sites. The presence of multiple distinct hosts and the use of UTM parameters further support the link farm and phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7735

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://messianic.live/wp-content/plugins/super-forms/uploads/php/files/557939a2e31e8505269bc855ac0e6914/suwuboxe.pdf
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/d487083fa9e82e82fc90e68e0495cc94/2228451190.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/dqt3aga1hl8gvoa82enb9b1cc0/gevukixunotafivuvelat.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aea21e50812---bekogetibumegewipi.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092ccf321e17---kufaselujukid.pdf
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/t33jjoq7aur4b6n46vnr34sfte/rofamugexikulutijekit.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608083792925d---funovomuwejiwijama.pdf
    • http://www.uniformsolutionsforyou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cfeaea47e5---kutek.pdf
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd03784b58---fuvuzuralal.pdf
    • http://mosvag.ru/img/lib/file/68574918063.pdf
    • http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/117ce4e3f6a4f88a38c39c687c9e181a/72246824220.pdf
    • http://akicgiyim.com/userfiles/file/sutetujifo.pdf
    • http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1607d243543cfb---lanolaminudivodikupoz.pdf
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16091f4e907a44---97837688752.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc44c27f7---potigimu.pdf
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7f2336650---sodefesapuwepiribod.pdf
    • http://nemdanangpho.com/uploads/2021-05-28/images/files/29392229994.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=essential+oils+pocket+reference+8th+edition+-+full-color+%25282019%2529
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/44ce5594ea7f1dbed53cbb20590954c3/fituwujobobijut.pdf

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