Malicious PDF — malware analysis report

Static analysis result for SHA-256 af23b8b8e1aa0d90…

MALICIOUS

PDF

82.1 KB Created: 2021-07-03 21:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: 993634662e2f74a07e784bfc33669a4b SHA-1: 69054145fb07f2b9f6034ecfe5074d121514f488 SHA-256: af23b8b8e1aa0d90317847e4f457d779df5f0bb09237359d1a9050f5e8f0eb2d
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=from+word+to+pdf+for+free.
  • 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://aarogyamedico.com/userfiles/file/digonelepeki.pdf In PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d7c6fc789fb185096da2ea6dcd8d138d/70967858771.pdfIn PDF document text
    • https://www.hungarianassociation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607307d935505---32367121950.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/11655806789.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aca3e18823c---70629085420.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/cc86b0be1314d9bcf689d05115cb2d1b/zexozafavakupabu.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b717b953db3---jixuwomofagukunibawoxi.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/99220816327.pdfIn PDF document text
    • https://europartner2.pl/uploads/zekoruniwunorajevevupe.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/gazubamizaj.pdfIn PDF document text
    • http://uniquehotelsolutions.com/files/others/94762133182.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/37169457890.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/6hr3v8ink1rrl5crcc3oguts6j/38337126232.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d93c3a5c891---xegudaxura.pdfIn PDF document text
    • https://www.lamuccacompany.com/wp-content/plugins/super-forms/uploads/php/files/cfcd3041db419150816efe5a1777d2de/98024623965.pdfIn PDF document text
    • http://miamiwars.pl/wp-content/plugins/super-forms/uploads/php/files/ad44b850dbd58e861bc1ff7eb910c8be/87206853822.pdfIn PDF document text
    • http://aqbnb.com/uploadfile/file/34191647045.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/zisalarizodobozudi.pdfIn PDF document text
    • https://felix-schulze.biz/wp-content/plugins/super-forms/uploads/php/files/kkjvp2eqcer8748kddig4mql4u/vigujifusajusedi.pdfIn PDF document text
    • http://businessvaluationapp.com//fck_files/file/basanidutomosusevewezoxib.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/o9h8a5rsiejv5hmqp6pm1kar30/voluvelog.pdfIn PDF document text
    • http://assistance.uz/images/shared/file/91259815554.pdfIn PDF document text
    • http://itineraire-consulting.com/ckfinder/userfiles/files/kafasope.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/01dde436334a83995c8b3082ec010c00/79635013917.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/066p0alecvoo58jd9sh4ntju8i/35948533716.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f54b2c77f---40623376505.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=from+word+to+pdf+for+freePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d663.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD663 10152 bytes
SHA-256: 433cbb4a6dc380bb3964ea018993ea7589ca3bce48e6bae9092650894d7041e2
font_01_sfnt_off0000ed1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED1C 17368 bytes
SHA-256: 315bdd7b88fce313f17b2cedef319eec77c635839557cf07c2807b2f320bbf98
font_02_sfnt_off00011ab6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000132c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C3 1636 bytes
SHA-256: e3a1ca7fbcde87b6e2bc585668cff1a50452d2a09c95c546c16e9f90aebd6500

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