Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5dcf161aaf77cd6…

MALICIOUS

PDF

80.4 KB Created: 2021-08-19 02:38:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: 69782531e4cf208c39eaeca36e332a16 SHA-1: a5d9c699fe60c83feb0fa45b7b7eeef81e7453f1 SHA-256: c5dcf161aaf77cd66a9c6375c853ef2f20d7dedbae7dcced9da395f5c40943e7
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/00f3e9af329c83c3c687c552619ef236/wesosizifo.pdf In PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1310d37c7---dakus.pdfIn PDF document text
    • http://erdivigado.hu/userkepek/file/91263049804.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/57172166664.pdfIn PDF document text
    • http://kfnmsz.com/upfolder/e/files/20210725142248.pdfIn PDF document text
    • http://veraschwemmle.de/fckdata/file/vovudewowige.pdfIn PDF document text
    • https://pametnidom.hr/pametne_kuce/userfiles/file/27018566885.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/33814741612.pdfIn PDF document text
    • http://muntepa.com/userfiles/files/7170384753.pdfIn PDF document text
    • https://ipic.vn/userfiles/file/4457696373.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160766afa7a9bc---12809895896.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e76692956---girobikinuruludoviserogo.pdfIn PDF document text
    • http://gourmethousemacau.com/UploadFilesfile///34217610106.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/85163584871.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f644e8583c4---25390077153.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/midigimevetuwuf.pdfIn PDF document text
    • https://lenaoyunlar.com/calisma2/files/uploads/141584189.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/1501790dda659b9edaf987f4de15ba50/bonazumesibunajudux.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c360072e9---85650602971.pdfIn PDF document text
    • http://186086.com/upload/files/65330416752.pdfIn PDF document text
    • http://bularz-auto.pl/images/userfiles/file/jikukadobumepem.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c0d46e5595a---gomotenokenetolekaguwovix.pdfIn PDF document text
    • https://denizlihorozu.com/resimler/files/32256095903.pdfIn PDF document text
    • http://fashioneducation.ru/userfiles/file/tufimamibupebunizunu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=five+nights+at+freddy%27s+6+hack+apkPDF 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_off0000d47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47D 17400 bytes
SHA-256: fa906da8a32255b0493620030b3cf5c586d1eab4809a06e36de7ad49c094e3ea
font_01_sfnt_off00010121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10121 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11938 11184 bytes
SHA-256: e706b5466bfe37c59f491d2ecd888dd7c8f09a2d11c18bc14b4b86767a0762da