Malicious PDF — malware analysis report

Static analysis result for SHA-256 13874b3aa79d2daf…

MALICIOUS

PDF

68.3 KB Created: 2021-09-22 23:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: fd6173d9126a7790a984fa8736a2dfd0 SHA-1: 53c667a0ed19bd2484c00f0215e9f9ec73a17f99 SHA-256: 13874b3aa79d2daf97efbacdb2c031bd557ff43f7f41461a69c4d513813d2464
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a Pdf.Phishing.Trojan detection. Heuristics indicate it functions as a link farm, directing users to compromised WordPress uploads and disposable hosting. The embedded URLs, such as the one pointing to a PDF hosted on lcd96.ru, are likely intended to lead victims to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4465

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 https://lcd96.ru/wp-content/plugins/super-forms/uploads/php/files/57c6f814a43cd566ebc97f804071a24a/gipixeg.pdf In PDF document text
    • http://amongelite.com/ci/userfiles/files/53522773949.pdfIn PDF document text
    • http://peaceinsrilanka.lk/userfiles/file/60077117951.pdfIn PDF document text
    • http://thegioixedap.net/upload/files/13373070118.pdfIn PDF document text
    • https://shoppingplanet.ro/ckfinder/userfiles/files/wikawozelagiluz.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/poludaso.pdfIn PDF document text
    • https://lostfoundglobal.com/userfiles/file/40132076134.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/82545006740.pdfIn PDF document text
    • https://archielectronics.com/userfiles/files/84974928235.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/hu9r72i4ggflgi9bmsn9mq41fv/30149448210.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/fegazakijabobeb.pdfIn PDF document text
    • https://saatyapi.com/upload/ckfinder/files/zenob.pdfIn PDF document text
    • https://campermagazine.tv/public/file/zuguzufufigabanewibe.pdfIn PDF document text
    • http://www.mariabeckmann.com/fotos/uploads/files/94875287052.pdfIn PDF document text
    • https://matricula.hssanesteban.cl/files/ginezo.pdfIn PDF document text
    • http://rideabikenews.com/user_img/files/17824068659.pdfIn PDF document text
    • https://marsanz.pl/uploads/fck/file/pozalozilagexiketolano.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/mavir.pdfIn PDF document text
    • http://medrea.ru/upload/files/bugiluna.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/bidiradisojitus.pdfIn PDF document text
    • http://gonganmi.com/userfiles/file/fizavasoga.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/37878418918.pdfIn PDF document text
    • http://goksirlambinowice.pl/img/upload/files/vonimi.pdfIn PDF document text
    • https://xenang-mitsubishi.com/fckupload/file/fofamuxafazisixagad.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/64cf26de141b0b2e95624eded7af7874/duzegadamogesupob.pdfIn PDF document text
    • http://muszempilla.com/files/file/56013417280.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///sijilemeribegugiwipe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=link+to+open+android+appPDF link annotation

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