Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5d0fa8e51897ea0…

MALICIOUS

PDF

142.6 KB Created: 2021-12-15 05:17:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-28
MD5: c0cdeb8857a62d67a24835b38ab129cd SHA-1: c8cc6696e1e73ff96083a5e29eabed163c3f2ea3 SHA-256: c5d0fa8e51897ea05e1f065ded7ae97b8b087567784c83c5d358b37057e01b6c
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.8905

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://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16132a59fc3b1b---77559721404.pdf In PDF document text
    • http://chukysovin.com/img-svc/files/19951468192.pdfIn PDF document text
    • http://engineersclasses4competition.com/files/others/23408243722.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/kejulabobavab.pdfIn PDF document text
    • https://autotronics.vn/userfiles/file/89899076000.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///202110147320_411163435.pdfIn PDF document text
    • http://ksiclubcom.ksiclub.org/svnprojects/DHD/Source/images/files/29262003987.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/68130172814.pdfIn PDF document text
    • https://beehaviour.nl/userfiles/file/xifafagaserugel.pdfIn PDF document text
    • https://condominiovillage.com/userfiles/file/51495564585.pdfIn PDF document text
    • http://adriennemason.com/assets/files/xezafutakenuzek.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/90230842885.pdfIn PDF document text
    • http://savvyais.com/userfiles/file/49397493609.pdfIn PDF document text
    • http://investbuild.ru/var/upload/file/60483159585.pdfIn PDF document text
    • https://learningsolution.ca/userfiles/files/20335422793.pdfIn PDF document text
    • https://sunkamalzemecilik.com/userfiles/file/49481655896.pdfIn PDF document text
    • http://lepetitjaunais.com/userfiles/file/58556768531.pdfIn PDF document text
    • http://harekatmemuru.com/images/Media/files/72677118325.pdfIn PDF document text
    • http://studiosimonepantaleo.it/userfiles/files/82575860647.pdfIn PDF document text
    • http://fratellibeninca.com/images/file/tixujusomofurawovaju.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/161b64d55a013e---barupogaxejuk.pdfIn PDF document text
    • http://0953057778.kad.tw/kads/ckfinder/userfiles/files/25579501644.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161600153b0056---zijoperijawuzebodaju.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/risimudipoxibimexuvedexe.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614f184f58eb8---pumutetudofuvewamov.pdfIn PDF document text
    • http://someteme.com/archivos/_20211116024900.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/oscUj7J0Gjw/uplcv?utm_term=quality+and+safety+in+nursing+wguPDF 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_off0001cebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CEBF 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_01_sfnt_off0001e55e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E55E 17652 bytes
SHA-256: 8430f281757b3b80d2b5ce1d19655ac0f321748dae10bc5ba2c05a8f7b7cb27d
font_02_sfnt_off000212c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x212C7 10768 bytes
SHA-256: 81e07168b7033b3d8d5b2ec6d110ff3de41f456f88daec3bd7b1ac8bebd77dc6