Malicious PDF — malware analysis report

Static analysis result for SHA-256 af2355c7a829b30e…

MALICIOUS

PDF

77.1 KB Created: 2022-04-25 20:37:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-21
MD5: 521762df91ed51b5029f228659d77789 SHA-1: c8e61c0b621771a865357ed732bf18bb127c5229 SHA-256: af2355c7a829b30e17cc2483f327874b8d06fb02c902d360aa5c009d6ea30880
186 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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mifuj.co.za/YmrXLWy8?keyword=rese%C3%B1a%20del%20libro%20la%20leccion%20de%20august PDF link annotation
    • https://hokusui.co.jp/hsk/wp-content/plugins/ckeditor-for-wordpress/kcfinder/upload/files/61664645826.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/kowesokite.pdfIn PDF document text
    • https://cursosadistanciayonline.com/medios/files/vexezovabo.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1626072377dd18---senalogopabibaj.pdfIn PDF document text
    • https://susunagetasapok.weebly.com/uploads/1/3/4/4/134470533/xuwowofor_zoxuvavebevigeb_goguvefarubop.pdfIn PDF document text
    • https://xepovilebifupu.weebly.com/uploads/1/3/6/0/136086158/dadatof.pdfIn PDF document text
    • https://sujixiku.weebly.com/uploads/1/3/0/7/130739139/vupadexur-bumoji-rujoguvawi.pdfIn PDF document text
    • https://nuzopotox.weebly.com/uploads/1/3/4/4/134497293/6280221.pdfIn PDF document text
    • http://kojeneckezbozi.eu/userfiles/file/ziwonepopepekibomoropag.pdfIn PDF document text
    • http://xn--3e0b556bhrbowi6undva.com/ckupload/files/migoxisitaponufen.pdfIn PDF document text
    • http://tubesealer.com/uploaded/file/9190997146205926ceb62a.pdfIn PDF document text
    • https://ruwijupoxotafan.weebly.com/uploads/1/3/0/8/130814308/8124518.pdfIn PDF document text
    • http://hydrogears.com/survey/userfiles/files/ripemop.pdfIn PDF document text
    • https://fababeporutow.weebly.com/uploads/1/3/1/3/131381804/kerobojebak.pdfIn PDF document text
    • https://kudarori.weebly.com/uploads/1/3/5/9/135960502/e21d5fa8f8a.pdfIn PDF document text
    • https://vobelerevofago.weebly.com/uploads/1/3/4/5/134596527/wosuvitedav-werevazajolak-jemal.pdfIn PDF document text
    • https://vajibudutoneraz.weebly.com/uploads/1/3/4/3/134345344/164889.pdfIn PDF document text
    • https://rikizanasurixa.weebly.com/uploads/1/3/1/3/131379420/fejigetumuje_pinol.pdfIn PDF document text
    • https://bofobepo.weebly.com/uploads/1/3/4/8/134887365/7640716.pdfIn PDF document text
    • https://wexarasi.weebly.com/uploads/1/3/4/3/134351888/nibasuwireratodi.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_off0000c4b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4B0 11036 bytes
SHA-256: 18ab8e63ea8f19ec1d7ed366a95420c9d34c6cc7e536a7a3c4f640444c24a53a
font_01_sfnt_off0000de05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE05 18152 bytes
SHA-256: 77a66ed840c5fe416b31ec58d23ecc22be149ee0fcfe9d6e66a551cc31682519
font_02_sfnt_off00010ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CA7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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