Malicious PDF — malware analysis report

Static analysis result for SHA-256 49af276c65f0b429…

MALICIOUS

PDF

75.2 KB Created: 2021-09-18 17:18:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 74f624a8e29bac4efd31c3d605606a4c SHA-1: f066bef327da8de4eb323e6346031156cbd1659a SHA-256: 49af276c65f0b4291ea7f997a0c17de2cda785f732919d7b360c8e0840a1cc74
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm designed to redirect users to download a file, masquerading as a legitimate download. The URLs point to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 6

  • 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
  • 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://archism.ru/uplcv?utm_term=download+flashpoint+paradox PDF link annotation
    • https://dpt-mh.com/uploads/news/files/76995679581.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/12692321589.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613efe805f309---81474426647.pdfIn PDF document text
    • http://hardiebase.com/uploads/assets/filefile/pebaposisijam.pdfIn PDF document text
    • http://combatkuntao.com/ckeditor/ckfinder/userfiles/files/23900595916.pdfIn PDF document text
    • https://etravelbox.com/scgtest/team-explore/uploads/files/jisodebatixufenazupo.pdfIn PDF document text
    • https://dispecom.com/cms_dispecom/sgi_userfiles/userfiles/files/donuxetaboweki.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/71682608332.pdfIn PDF document text
    • http://grupafurman.pl/!mag2011/userfiles/file/razupapenexuliwajiko.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/24698577265.pdfIn PDF document text
    • https://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/161406b13d912e---54688116619.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/futunukivuzenifefimikun.pdfIn PDF document text
    • https://jesssmithtri.com/jesssmith/ckfinder/userfiles/files/85401093385.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/lukuzoxebirumenowuvaga.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16144834068b42---kaxun.pdfIn PDF document text
    • https://ip-pharma.net/data/files/3473722939.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/nomorapiguxiki.pdfIn PDF document text
    • https://budgetparking.ca/admin/uploads/file/gedigo.pdfIn PDF document text
    • http://mallenmediations.com/mallenmediations/images/userfiles/file/75861911451.pdfIn PDF document text
    • https://lesrimaudieres.com/images/uploads/file/piremimijejufanu.pdfIn PDF document text
    • https://bomando.bomsolar.com/uploadfiles/files/mofidazaxamapomiwag.pdfIn PDF document text
    • http://jafra-com.at/userfiles/file/juvesozawixo.pdfIn PDF document text
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEF 10652 bytes
SHA-256: 6337f6f9592cd91c398a01fe9b98c62b99acd38c286c445cd6970eb058519c7f
font_01_sfnt_off0000d844.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 18120 bytes
SHA-256: 270a6799d1265f5c302c0a3306db4b332a0eb6a11bc54d5c4c37d4d857b1378a
font_02_sfnt_off00010768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10768 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1