Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d834b9a0a33e533…

MALICIOUS

PDF

85.3 KB Created: 2021-09-17 00:36:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-18
MD5: d1eb67250cf4715bdc580ff5aa3c59da SHA-1: 8cb344b3f4b2ed562f56b22ee0c77a50496bd4d8 SHA-256: 5d834b9a0a33e533fe48918dce96bb0ef4983e1136e5f5d55eb3c0d7db1a7b5e
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cf5c118372---miwisezujisu.pdf In PDF document text
    • http://techcessgroups.com/userfiles/file/sumomulebukonewemalem.pdfIn PDF document text
    • https://szpital-sulecin.pl/images/fckfiles/file/51633541155.pdfIn PDF document text
    • https://tainandentist.com/uploads/files/202109111910485834.pdfIn PDF document text
    • https://lexconsulting.ro/webroot/files/media/53513451594.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137f1b78141f---20465621624.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/vokinasiximubajeduni.pdfIn PDF document text
    • http://greddy.com/admin/common/ckfinder/userfiles/File/pilonibuxezumuret.pdfIn PDF document text
    • https://ptogel1.com/contents/files/6556610847.pdfIn PDF document text
    • http://vako.vn/app/webroot/uploads/files/5088546841.pdfIn PDF document text
    • http://villapellegrino.it/userfiles/files/48757526658.pdfIn PDF document text
    • http://www.pacautomarketing.com/file/zodetazerawupexanaxazavu.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/oongmliadhiamiv9rjdfvnqooj/sabafonudosafog.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/34797172573.pdfIn PDF document text
    • http://2015.letnifestiwal.pl/ckfinder/userfiles/files/jamifixepodilijazifafu.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/74749479654.pdfIn PDF document text
    • https://webshopplus.nl/app/webroot/files/userfiles/files/defamiwofazatawizuguse.pdfIn PDF document text
    • https://indicaperu.com/userfiles/file/60840471707.pdfIn PDF document text
    • https://podiummagazinenews.com/ckfinder/userfiles/files/vabidosabazidaleleru.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161341704b2644---sinitozefewubu.pdfIn PDF document text
    • http://rockefellersgold.hu/editor_up/55385021326.pdfIn PDF document text
    • http://kenhuffbuilders.com/userfiles/file/1791041993.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/texikimage.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=tubemate+2021+free+downloadPDF link annotation
    • http://e1pl2.nazwa.pl/busy/fotki/file/84080421627.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_off0000e7f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7F2 17972 bytes
SHA-256: e1b04a66f1bdc5549c02e71acb5bed1de8943ca71588fa34d3f716ea9c261fb2
font_01_sfnt_off00011636.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11636 10836 bytes
SHA-256: b8517c715f03e96761bac620c3a3aa6a4d0cc367990ed68869db22540aff2aad
font_02_sfnt_off00012f57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1