Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce2284eed2e167f…

MALICIOUS

PDF

89.6 KB Created: 2021-09-02 09:08:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 326cee7e2f36361122c5a11363680876 SHA-1: f5d9a5e1b0315ded54c4087277a8479f621a2ee6 SHA-256: dce2284eed2e167f2d8c88e19bbc6c8087ef6d1463fabda4e423fad1f6de09ee
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, which likely serve as part of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the structure and URL patterns are consistent with phishing campaigns that leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://allytemp.ru/uplcv?utm_term=perspective+for+artists+pdf PDF link annotation
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/b7588e066378d49cb09bffd93c43a351/rafajudazimo.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f4deb12010---1454175740.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/ee523889e41fe7c900634d947413d02c/49220893492.pdfIn PDF document text
    • https://najarshi.com/basefile/najarshicom/files/vuguvekozibufapuzowidakiz.pdfIn PDF document text
    • http://hanauhrova.cz/files/kuweguperavasegamozes.pdfIn PDF document text
    • http://kingspec.su/wp-content/plugins/super-forms/uploads/php/files/qrqmfosqjj1og1bkvebl92c5bk/16826209721.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c9820e905fd---zajevorasarofos.pdfIn PDF document text
    • https://digireg.cz/upload/finedeminixiwixo.pdfIn PDF document text
    • http://wumag.pl/userfiles/file/taguraxafaluwoji.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607224b5d7832---41422158287.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/fevirubulesatote.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/b12105ce8cdf84dd5b1d7ccb3c3ae4c4/mimidekojafabupagaxipari.pdfIn PDF document text
    • http://bamboomfi.com/htdocs/cljr/data/files/41838587597.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/u957u1jubocl97pk1s6chvqpv4/41457715826.pdfIn PDF document text
    • https://espaciocultivarte.com/ckfinder/userfiles/files/divugoravine.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/j8nllnpf7tangbe08fiq09s1od/govavor.pdfIn PDF document text
    • http://polymer-optix.de/userfiles/file/80328554175.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/daaa7711d4b6a80c24aa13d61bf01540/patovuzon.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/7d89a1f716cf44bbee7065309f90b6de/tezugozevibolarotab.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/97178338301.pdfIn PDF document text
    • http://anatolianlgs.com/userfiles/file/3984116519.pdfIn PDF document text
    • https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/58574cb3ee737745b1372f63880ef8d8/25258490133.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_off0000f986.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF986 17776 bytes
SHA-256: fcadc47eb06ea4e7e6045b04da28e30e0168d30e05e5e9b1411c3e0e8e329309
font_01_sfnt_off0001274d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1274D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F64 10528 bytes
SHA-256: 674042021c4bb763f3b20811e81119c41cc6fcf20b5427e1518aa238d707d41f

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