Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a1a63fed30e63d5…

MALICIOUS

PDF

79.0 KB Created: 2021-08-11 05:42:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-30
MD5: b4d1e1544967ad6baa0f8d410a612389 SHA-1: 52d925a85fa41b84cfbace654dd45e60a54d32e6 SHA-256: 5a1a63fed30e63d5b520dd26bf77ea6df13f7513b824a3634ac69b09046e8b04
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://aksusu.com/upload/files/83588054587.pdf In PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/17a2dd50032144b88229a4fccb53a1a9/golunatixara.pdfIn PDF document text
    • https://trotusgrup.ro/ckfinder/userfiles/files/kixalavak.pdfIn PDF document text
    • http://harckocsik.hu/userfiles/file/timelataziwavigilelu.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/7k6ivle9eo5qtbf3t2342kjh8i/mutite.pdfIn PDF document text
    • http://ferramentabelleggia.it/public/file/nofebubidobafasaxe.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/87367118319.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160b2c73b9ce22---56681545823.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b62d453c77---wopawawur.pdfIn PDF document text
    • http://brmc.jp/user_data/userfiles/files/rimowa.pdfIn PDF document text
    • http://evopizza.lt/ckfinder/userfiles/files/16996021029.pdfIn PDF document text
    • https://adikkedua.com/contents//files/tujada.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/32569264602.pdfIn PDF document text
    • http://dulichgiahy.com/upload/file/12537864710.pdfIn PDF document text
    • https://carlojans.com/cms/file/zuxipiwetefepipinibujabi.pdfIn PDF document text
    • http://xn--kprq5pvqklteonubj6c.tw/CKEdit/upload/files/99994842564.pdfIn PDF document text
    • https://rozgarnetwork.com/ckfinder/userfiles/files/70421715377.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce89248348---vemat.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/37764515988.pdfIn PDF document text
    • http://beerskiboot.de/img/upload/file/resofiradoguxe.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/0a6db06d7b95d083cdc08589c2dfbe6c/73255382843.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c49b72dfdbb---xidofamakekodexezeti.pdfIn PDF document text
    • http://worldofpacifiers.com/editor_uploads/system/files/7262502484.pdfIn PDF document text
    • https://shotclock.ca/wp-content/plugins/super-forms/uploads/php/files/f337b11496ae257c3aa64a286d0a4ee3/42709648798.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=continuous+and+discrete+signals+and+systems+soliman+solutionPDF 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_off0000d071.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD071 10960 bytes
SHA-256: 545cf61c998dac8cd254f713ba7310ebe1e9f8d8fb5695cbe3cd795522e95e0a
font_01_sfnt_off0000e9b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9B5 16832 bytes
SHA-256: 74e9b8c18b624937e331e80c128d3774b4080e5ca7956340a16e2a5eee1add0f
font_02_sfnt_off000115b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1