Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af8d37fb786558a…

MALICIOUS

PDF

71.4 KB Created: 2021-12-14 02:29:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: c6533c3f2bc5a515e90c37841dd18798 SHA-1: 8475a11319228858d26aed862bf8912fdf71a3c9 SHA-256: 4af8d37fb786558aa6f3d06895dd151feedc32bf1079558d9dc571b5dac0e02b
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://rajatotogroup4.com/contents/files/xatojusufi.pdf In PDF document text
    • https://kindeeyudee.com/ck_files/files/67858052535.pdfIn PDF document text
    • http://svaz-podnikani.cz/files/file/luwixomefifimoboj.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/vukeruwurunaraxisalareg.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161630baf7280a---15032074783.pdfIn PDF document text
    • http://www.ciesol.es/ckfinder/userfiles/files/34390452856.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615854e18072f---41849742373.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16178aaff7e924---58375750107.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/2060770959.pdfIn PDF document text
    • http://educasters.co/ckfinder/userfiles/files/jolikovaponexomabe.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7b71e8529330065e4b2f1635367d8397/jogujoxabijulafapel.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/kokexigevufuv.pdfIn PDF document text
    • http://mapect.com/upload/fckeditor/file/44783567586.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/161a2df0bb37e9---sapoxogufunikusirolakiran.pdfIn PDF document text
    • http://deepakbatteries.com/uploads/file/56959665069.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1619fbb5c5400c---59048924886.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/93803504232.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/mabajepejunofu.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/50285022296.pdfIn PDF document text
    • http://abbeytraining.net/userfiles/file/67629778681.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/22386231898.pdfIn PDF document text
    • http://honyi.tw/ckfinder/userfiles/file/69301775105.pdfIn PDF document text
    • https://www.newhorizonscrisiscenter.org/ckfinder/userfiles/files/vunedetilivofatokopiweda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Gsjc/~3/vItLtdF7Pec/uplcv?utm_term=fisher+and+paykel+fridge+rf610adusx4+manualPDF 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_off0000b26d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB26D 16864 bytes
SHA-256: 1c99d0515ca452a789d76779346549f3983f8b834a6b4a7a99e21f6da1b8ee2f
font_01_sfnt_off0000de32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE32 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0000f4d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4D6 11532 bytes
SHA-256: d991a404d020214488f65d2119a7d6c549e04f34e02366357b81d844c6567903