Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd4f6133a19b13d1…

MALICIOUS

PDF

82.4 KB Created: 2021-06-17 13:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05
MD5: 8e5cfca54d74a015483176cf5b76e934 SHA-1: e0bd5343508fd5d8da8c27c2f88b5d4717fe1069 SHA-256: dd4f6133a19b13d1c3113228230366ee47d394e8fc9975950853191ac9f4f9b4
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

This PDF document is classified as malicious by ML models and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The 'SE_BROWSER_INSTALL_LURE' heuristic suggests the document attempts to trick the user into installing malicious browser extensions or updates. While no scripts were directly extracted, the presence of numerous links to potentially compromised websites and PDF link farm heuristics point towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://anjingliar.com/contents//files/79488718950.pdf In PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/2v4on0aod5le3vos6ll1vc7nsa/66257813429.pdfIn PDF document text
    • https://west-holding.com/userfiles/file/xutudomesukoriri.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb9747f0ae---wikopuxofobu.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/85348876702.pdfIn PDF document text
    • http://1hozain.ru/files/userfiles/files/nudaguvamagugiponesopopi.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092109826149---37517992277.pdfIn PDF document text
    • https://latework.cz/soubory/xazawaguwemaf.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607606f8ef951---37838029867.pdfIn PDF document text
    • https://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/6cho5dpf74uac2t9jm677b1lk6/renix.pdfIn PDF document text
    • http://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/kivafijon.pdfIn PDF document text
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/9ba483037ccebf701105a41be8139ac1/74730935656.pdfIn PDF document text
    • https://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/29e469ec225631cf802b2743fd41aef5/laripemopuxofasawumiwufak.pdfIn PDF document text
    • https://aashianarealty.com/file/xivokofuxogefosijigubo.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/de379a6b2216104c25c29741eed51754/jewuturiraxi.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160962c5959aab---kaxuguvadu.pdfIn PDF document text
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5da64362f8---nimoxanesopajajelop.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/55218794084.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+add+chromecastPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010528.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10528 5200 bytes
SHA-256: a71b36e6282d5111f84b711f872957b647ad69429eeab7300754eadb108b0654
font_01_sfnt_off000116bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116BC 11208 bytes
SHA-256: 0f4870ba09f57a82ab443c8b9174d0f7c7fe7c8b86bc5408e26b9b75073f93b1

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