Malicious PDF — malware analysis report

Static analysis result for SHA-256 933cd75b05e07cc5…

MALICIOUS

PDF

56.7 KB Created: 2021-09-24 06:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 07b34631fafc31aedce8518673b3c1d0 SHA-1: 3ddc1545be2abbeb6f01b443220dfceb274949da SHA-256: 933cd75b05e07cc5074e0f81748872e1a5c0ca23574a59c1d9d47c76cd7b0376
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs that form a link farm, with several pointing to compromised CMS uploads or disposable hosting. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure suggests the PDF itself is designed to lure users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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 http://msmzizkov.cz/data/dokumenty/regaxapiwun.pdf In PDF document text
    • http://envisystem.com/upload/userfile/files/wifuzekosovotisegugu.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/labuwidarelaratomefegep.pdfIn PDF document text
    • http://staropolski.net/Upload/file/6143180684.pdfIn PDF document text
    • http://europavloeren.nl/siteimages/file/vipuvisiseleputeri.pdfIn PDF document text
    • https://mongolia-volkslift.com/uploads/files/10178922251.pdfIn PDF document text
    • https://globalmediaminds.com/uploads/files/12904332811.pdfIn PDF document text
    • https://noddy.nu/images/file/34080879510.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614badb792733---48627866314.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/99400887924.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614c0d8aa8d6e---33542313247.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/df1jofu4jifps7cj0fcpqv9cc8/wojati.pdfIn PDF document text
    • http://www.chiringuitomediterraneo.com/ckfinder/userfiles/files/busetazaripak.pdfIn PDF document text
    • http://go-trec.com/wp-content/plugins/super-forms/uploads/php/files/7491j9r254jg6m6mk1me7334jc/fasusubifid.pdfIn PDF document text
    • http://goforthegreengolfpools.com/userfiles/file/90908940156.pdfIn PDF document text
    • https://kiptep.ru/file/88249653453.pdfIn PDF document text
    • http://www.brickchamber.com/ckfinder/userfiles/files/83983412621.pdfIn PDF document text
    • http://scuderieverdina.it/scuderia/userfiles/file/wuropepedovifejat.pdfIn PDF document text
    • https://bulgariapools.com/contents/files/jitokekexodu.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/30833310341.pdfIn PDF document text
    • http://www.jobsincrete.gr/images/_user_na/file/33598024837.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/sibepawezezalular.pdfIn PDF document text
    • https://egyseg.eu/ckfinder/userfiles/files/xavad.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/soxewomixiluta.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=usb+android+file+transferPDF link annotation

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