Malicious PDF — malware analysis report

Static analysis result for SHA-256 308e43b7541c4614…

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 14:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a83e865eaf900124888d324e2ab87112 SHA-1: 18f50215de998b66569ac5361b82f7186a977a7c SHA-256: 308e43b7541c46144ec7b2939bf05e34b0fd57ebc14abc621882cdde908057d7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://www.potravinyav21.cz/ckfinder/userfiles/files/gorebasopotanof.pdf In PDF document text
    • https://hunde-katzen.at/soubory/jowugodifamafogomajope.pdfIn PDF document text
    • http://tubietelbar.hu/uploadfile/25343917528.pdfIn PDF document text
    • http://eg-connect.com/uploads/editorfiles/file///65075535392.pdfIn PDF document text
    • http://zamel2.pl/userfiles/file/korarateninimavaduj.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210819161130.pdfIn PDF document text
    • http://vectorma.ru/uploads/assets/file/minisidejifoveludezu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611d663dd063e---3223960054.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/bebaguvovuwesakuwupin.pdfIn PDF document text
    • http://akademia-jedenastka.pl/zdjecia/fck/file/tasewazuvitidudoli.pdfIn PDF document text
    • http://arredamenticucinesiciliane.it/userfiles/files/xurozavipobirep.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/istrd1drtr9684shhegdre0356/xafarewovafidekapital.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e9016357e07---xinapazexibuwezexumesava.pdfIn PDF document text
    • https://betamachinery.sa/other_files/File/83417716503.pdfIn PDF document text
    • http://sys-svinding.dk/userfiles/file/89801463365.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/ggqbm1okficjfn2h7u0114tprv/38170161400.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/93073121056.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/fd47034cc90d9754beffe1104743fb26/tumeposipujorozo.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/63163940970.pdfIn PDF document text
    • http://bochosushi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ff8ae7dc48---sapibetavopuwujatadiwati.pdfIn PDF document text
    • https://ringid.vn/ckfinder/userfiles/files/mofuwovapedaj.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/pavulotemadowajoxi.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/mixidakajasefuzisiv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=harry+potter+and+the+goblet+of+fire+scriptPDF 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://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_off0000de23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE23 17896 bytes
SHA-256: 199526e85ef483e3d046174fc4cbf34a6b71faf48cb419d43e20e898787b6363
font_01_sfnt_off00010c57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C57 11144 bytes
SHA-256: 4ad8aed569796a48be1519ee3a8c052ec38270fe1669ce6016eb3c922e8b9921
font_02_sfnt_off000125d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.