Malicious PDF — malware analysis report

Static analysis result for SHA-256 d448841b2631d879…

MALICIOUS

PDF

70.7 KB Created: 2021-07-08 22:23:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5cc8fddfed31aea1197fc6d76432e9c SHA-1: ca60d8b3ae977214fa1e0e34613db139638304fd SHA-256: d448841b2631d87963d0759fba55d695876610ac36fa269619eb74a23f4ce9a1
182 Risk Score

Malware Insights

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

This PDF document is identified as malicious by multiple heuristics and a machine learning classifier, including ClamAV's Pdf.Phishing.Trojan signature. It functions as a phishing lure, presenting an image-only interface with embedded JavaScript that likely directs the user to one of the numerous external URLs found within the document. These URLs are hosted on compromised WordPress sites and disposable domains, suggesting an attempt to download further malicious content or redirect users to a phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5460

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 70 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://cructi.ru/uplcv?utm_term=how+to+eat+corned+beef
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160d365b1f08d6---sefipusuvi.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab68d5df174---12642637134.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16094b1da2da1d---tujanazalovamowuwadem.pdf
    • http://osteriadelcampanile.com/userfiles/files/mugulusivuzuronuje.pdf
    • http://shiinamotors.com/js/upload/files/dajudizelirofizi.pdf
    • http://ankurgroups.com/userfiles/file/givozavufiga.pdf
    • https://299-45.com/CKEdit/upload/files/lufabolet.pdf
    • http://omg50yrs.com/clients/6/6d/6dc66c997efb3e4e8ce6e6e7d0694e91/File/95455467118.pdf
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/ca54a56a78d2a14cfb9c7bb2c4c7fe8c/93584114882.pdf
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/58c7686dea3a2625a66e283e1d9a73a5/jemidelirir.pdf
    • http://cestovni-postylka.eu/userfiles/file/makeximevuwuziligomosik.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/pd5l76ga4sr0cedvghkfnj806g/63445580636.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/b8ae382a6f8a2e19e7b3a212a31cc946/rusopijuwelotigigo.pdf
    • https://abandassociates.com/ckfinder/userfiles/files/titanemarosi.pdf
    • http://rybarict.cz/webpagebuilder/ckfinder/userfiles/files/63010090007.pdf
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16092274f949e2---vexewapesezizedorebowaro.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/1aee64b5cd5f6f1b023c63bbbc4fdf74/vuget.pdf
    • http://myexamadvisor.com/fck_uploads/files/32744524816.pdf
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/7165ec68cd5b970d31d8ace86a3e06e4/98426877608.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/h51hdv2v17fmussma0e3er6a6u/6777174928.pdf
    • https://homeuu.biz/upload/ckeditor/pages//files/tozirexupux.pdf
    • http://hgbs.de/userfiles/file/76264904283.pdf
    • http://pokorny-podlahy.cz/UserFiles/File/gokosebebiger.pdf
    • http://sunwisechem.com/Uploadfiles/files/duzujawudegotiriteb.pdf
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606eadd22f409---83496370704.pdf

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