Malicious PDF — malware analysis report

Static analysis result for SHA-256 00c8134a42f88549…

MALICIOUS

PDF

47.6 KB Created: 2021-09-23 12:29:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: d257a7759a9122d5bee13f5900eb8bb2 SHA-1: acfe0640229a956b3443135aa7078d467374c637 SHA-256: 00c8134a42f8854965fff37bc8c950b688cdbc579bb611b03c0568b14a7ab600
154 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised websites and disposable hosting, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic confirm the document's purpose is to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7355

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://live-net.it/file/kamirisudotigur.pdf In PDF document text
    • http://yongchengtech.com/uploads/files/202109140146113483.pdfIn PDF document text
    • https://ximatinhdongnai.com/app/webroot/files/images/pages/files/5822612262.pdfIn PDF document text
    • http://carmakers.cz/userfiles/files/4371713705.pdfIn PDF document text
    • http://lube-stc.com/ckfinder/userfiles/files/xokofavenamutosujepasu.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b2689558ac---pulebajewaratuwejiki.pdfIn PDF document text
    • http://ihanzao.com/userfiles/file/20210907123236_1057270535.pdfIn PDF document text
    • http://nbc.com.vn/ckfinder/userfiles/files/kujizubojuke.pdfIn PDF document text
    • http://mayinluatudong.com/uploads/userfiles/file/sogekol.pdfIn PDF document text
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/misulozunazonewavin.pdfIn PDF document text
    • https://highlander-inn.com/assets/userfiles/files/49060919245.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210902_180450.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/u237qao1o9nnuqhg2t44s2idlu/98602737922.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1614b93ed4bdb8---26349825598.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/og55asfruv68ga2tg98helm2c5/79417645010.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/d87380f9d01b7e63da12fb5e962fed86/fugagopew.pdfIn PDF document text
    • http://status.cz/UserFiles/File/lisetezalixizitivogigi.pdfIn PDF document text
    • https://dijitalsanat.link/upload/files/kebowinatuzufubetari.pdfIn PDF document text
    • https://balarampurblock.in/ckfinder/userfiles/files/redijipo.pdfIn PDF document text
    • http://lonerangerfanclub.com/ckfinder/userfiles/files/39859392847.pdfIn PDF document text
    • http://urotunisia.com/uploads/FCK_files/file/fevomevigeporol.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161333049d6cb1---bajosabesefekunivisesoz.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1613f204ba9bba---40879432243.pdfIn PDF document text
    • http://dennehylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/41348213612.pdfIn PDF document text
    • https://baust.edu.bd/app/webroot/ckfinder/userfiles/files/25376283476.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=iphone+11+support+2+sim+cardPDF link annotation

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