Malicious PDF — malware analysis report

Static analysis result for SHA-256 214541a5bd64acf1…

MALICIOUS

PDF

50.1 KB Created: 2021-10-08 01:08:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 43e7ec5b0242862a659783fb027f684e SHA-1: b8a5e1c06747908f32aadec7e33ae143d8c35056 SHA-256: 214541a5bd64acf1187844187da3f4d92bd42e9c2e4923bbbcd51df0d1e0a1a2
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are part of a link farm hosted on disposable domains. The ML classifier also flagged the PDF as malicious. These elements suggest the document is designed to redirect users to potentially harmful sites, likely as part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5887

Heuristics 5

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://bollnas.boj.se/uploads/userfiles/files/46280773319.pdf In PDF document text
    • http://growlink.biz/userfiles/file/52223647072.pdfIn PDF document text
    • https://www.bankkartya.hu/js/ckfinder/userfiles/files/xojamilemo.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/vidonamatawixapogux.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/38443472982.pdfIn PDF document text
    • http://labonscafe.com/userfiles/6888152405.pdfIn PDF document text
    • http://gezond-trakteren.nl/kasteel-doornenburg-img/bestandenfile/wifogapu.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/nesodakuku.pdfIn PDF document text
    • https://kabelkyaobuv.sk/editor_uploads/files/fegodasaz.pdfIn PDF document text
    • http://vietnam-intraco.com/webroot/img/files/tuzakitovikavidedifesas.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/guvum.pdfIn PDF document text
    • https://intekcanada.com/ckfinder/userfiles/files/potisimanojef.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/161444f6b2b9e7---68986645081.pdfIn PDF document text
    • http://www.azurwelcomeservices.com/userfiles/file/24189752941.pdfIn PDF document text
    • http://atya.eu/files/file/93015083636.pdfIn PDF document text
    • https://www.phuketvillarentalandservices.com/ckfinder/userfiles/files/16446803955.pdfIn PDF document text
    • http://sameiroeventos.pt/ficheiros/37111802968.pdfIn PDF document text
    • http://mexvp.com/ckfinder/userfiles/files/xazim.pdfIn PDF document text
    • https://r4binsh4h9-att.com/contents/files/dowakefixovegelukera.pdfIn PDF document text
    • http://istvietnam.com/rich_editor/file/mitadetegigagumum.pdfIn PDF document text
    • https://nichecnk.leaddeehub.com/userfiles/files/zubesovefuvuzedubezov.pdfIn PDF document text
    • https://brylka-kfz.de/wp-content/plugins/formcraft/file-upload/server/content/files/16131b9ba70a91---mixofoj.pdfIn PDF document text
    • http://porpora.group/imagenes/imagenes_contenidos///88155657166.pdfIn PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141c695244b2---japulakeludubew.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/65879432645.pdfIn PDF document text
    • http://www.la-rocca.pl/app/webroot/files/files/12287047341.pdfIn PDF document text
    • http://floridare.ru/app/webroot/img/uploads/file/415408_148781179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=total+alphabets+in+arabicPDF link annotation

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