Malicious PDF — malware analysis report

Static analysis result for SHA-256 de91be6045f2a545…

MALICIOUS

PDF

98.3 KB Created: 2021-06-28 01:25:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: fe5e14845a2cc519ae97b761151e33dd SHA-1: c72023a70657de25ea4a5e5dd06ad054d6d4f359 SHA-256: de91be6045f2a5456f31473cfaf8171247554fa03b4e4d434bd2d3a0e53d1290
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains numerous embedded URLs pointing to compromised WordPress upload directories and other domains, functioning as a link farm. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a non-clustered link farm on disposable hosting, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, but the structure and URL patterns are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://coretry.ru/uplcv?utm_term=stainless+steel+tempering+colors PDF link annotation
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608848bce4996---90884939445.pdfIn PDF document text
    • http://amirafouad.com/uploaded_files/file/rebutujirusikir.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea78bcb2a7---72352812618.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c23416a01ad---zibapowuzeva.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607fcede31ca8---93097922214.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8532a4c81d---funopoxipeturofisefe.pdfIn PDF document text
    • http://stlnsk.ru/uploads/file/zojaxisarorexebonod.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/272c48f61811188dd6434946b3191e0b/kovekifogu.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/6e9e7d3e23e688694687e76afecddfa4/levodukavubiz.pdfIn PDF document text
    • http://granite1962.com/clients/869125/File/39166169650.pdfIn PDF document text
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/eaa08a2630d021462a0d6a3b901ecada/55468282204.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/4b7e8a53161cbcf6d2552b198ec6a031/sevudegavizopumozaroweb.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/5kpshbb30lod12ngb8gmmbfq15/6131816121.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/la2l68adrnfi4nmh1kjrutdbcs/57795272680.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/68ltiaikmo179hkt9n819srgvh/43049074125.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609281ffd1a59---76602369515.pdfIn PDF document text
    • https://iword.de/userfiles/file/fozetudo.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc70e305c7---duvumevipowexonajovep.pdfIn PDF document text
    • http://waberry1969.com/clients/877040/File/77866857984.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1624625367874731603.pdfIn PDF document text
    • https://mimpishio2bet.com/contents//files/wedenuragujumuboj.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608094e7027ad---14584942254.pdfIn PDF document text
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/160836f64ecd8e---tilovamokiwevijuzokoduxim.pdfIn PDF document text
    • http://straub-online.ch/userfiles/files/pevojul.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e21d70496---nipuzapu.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_off0001192b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1192B 18292 bytes
SHA-256: ee859016bf1049f0b60d7130fabb5bfac461573e73a127746f9588fd86dc8b51
font_01_sfnt_off0001497f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1497F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016196.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16196 10792 bytes
SHA-256: b037972432c47a1b7a56b72551f2e9198bf424f5dcb74ea8fae101973cf11579