Malicious PDF — malware analysis report

Static analysis result for SHA-256 4788dd73986a610e…

MALICIOUS

PDF

77.1 KB Created: 2021-10-04 18:50:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-20
MD5: 09c3186203d49cfdfce1133a7ccd8d88 SHA-1: eb1fefb0f109ea1886abc48cf66e1bf8493e5193 SHA-256: 4788dd73986a610e710532835e9fc8321b0a9e735b8d009b037334d7f5afbb82
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://wastran.ru/uplcv?utm_term=genetically+modified+potatoes+pros+and+cons PDF link annotation
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/xudumegowajibun.pdfIn PDF document text
    • https://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615418e464a99---zazozotalatamuroritetal.pdfIn PDF document text
    • https://laptopserwis.com/app/webroot/media/files/kokutigugavalitid.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/kilemezevabez.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/584240a6f89170ce647c8aa3ee37e2b6/39671071744.pdfIn PDF document text
    • http://eg-connect.com/php_codes/Scott/VieauAssociates/code/userfiles/file/89534968102.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/17513910609.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/31396500655.pdfIn PDF document text
    • http://tacchigroup.com/public/thread/risorse/file/71783763251.pdfIn PDF document text
    • https://delcinfo.ru/img/files/files/78646477914.pdfIn PDF document text
    • http://sure2trips.com/bot/ckfinder/uf/files/lumomumevaka.pdfIn PDF document text
    • http://hzxf.com/images/upload/File/64180749724.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/92937978925.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/161423fccbcbbe---94694374001.pdfIn PDF document text
    • http://xn----8sbemnkjd7bfu.xn--p1ai/design/img/upload/file/rebifiruru.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/nipexesuvar.pdfIn PDF document text
    • http://e3edu.vn/public/ckfinder/core/connector/php/connector.phppublic/uploadsfiles/vudagevizovifa.pdfIn PDF document text
    • http://kronospan-mofa-hungary.hu/editor_up/kukexitosegomivi.pdfIn PDF document text
    • http://kirsanov-maslo.ru/uploads/notozemawub.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614448512988b---fofuxatul.pdfIn PDF document text
    • https://e-room.co/userfiles/file/xiwesuxagubutazas.pdfIn PDF document text
    • https://xtremefitness.com.au/application/third_party/ckfinder/userfiles/files/38506214167.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/31365271876.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_off0000c8fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8FE 10936 bytes
SHA-256: 06245a7ee8ccec67a55b7a1f7f39496fdc52519928d4f3a081884d92e08f316d
font_01_sfnt_off0000e25f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25F 17432 bytes
SHA-256: b049d8d57a248e6c26affc9c611a7a6823a67be8255c3b27796b834b52547f06
font_02_sfnt_off00010e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1