Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fb822d48e3534b…

MALICIOUS

PDF

92.0 KB Created: 2021-09-18 21:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-02
MD5: 82c86c26f8f2512096592f5f68d6ade6 SHA-1: 3f23e5a27f62dfda43c8eb32fa570f71914ec73c SHA-256: a4fb822d48e3534b2923551ad2f871610057ad532d4fceabc8688d1dd1eac711
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://krisoc.ru/uplcv?utm_term=fast+9+full+movie+free+download PDF link annotation
    • https://cytokin.ca/upload/editor/file/nisigubozojumoxawi.pdfIn PDF document text
    • http://mikol-styl.cz/userfiles/file/vibasimibelo.pdfIn PDF document text
    • http://basyapiemlak.com/yukleme_klasoru/userfiles/file/lofonufolokelolamekadi.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/17349991221.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/161388de898c31---2999910720.pdfIn PDF document text
    • http://musicincw.com/fckeditor/userfiles/image/lovereferilirejogo.pdfIn PDF document text
    • http://szkolka-wiercioch.pl/files/file/11574740630.pdfIn PDF document text
    • https://dellrein.ru/content/file/vuxowagikoso.pdfIn PDF document text
    • http://turatabor.hu/media/18440968236.pdfIn PDF document text
    • https://badanie-wody.pl/galeria/file/xevofu.pdfIn PDF document text
    • http://agro-partner.com/Image/files/77994251681.pdfIn PDF document text
    • https://sydneystudytour.com/accounting/userfiles/file/35633692057.pdfIn PDF document text
    • http://oikoscoccatoarchitettura.com/userfiles/files/80791361751.pdfIn PDF document text
    • http://yournamebadges.com/withyourdog/cms_uploads/file/vupovulujizewasejejubeku.pdfIn PDF document text
    • http://masan315.net/board/imagefile/file/48115669166.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/vomizaluka.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b22b6572bb17041dc7924bcbc77b5b3b/kukavolaxidawewus.pdfIn PDF document text
    • https://nomaquito-travel.com/editor-images/38409320829.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/14914077034.pdfIn PDF document text
    • http://djapm.com/userfiles/file/roder.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/30612813612.pdfIn PDF document text
    • http://hasadtemizlik.com/upload/file/sapilagokojaf.pdfIn PDF document text
    • http://mmbassisiprovince.in/files/js/ckfinder/userfiles/files/84144322752.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 extracted file (font_00_sfnt_off00010406.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00010406.bin)

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010406.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10406 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011c1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1D 10912 bytes
SHA-256: 0eacfec599a08b6f4c6a22f4e2e64d6d5f348cb3c4390aec743569b818819cad
font_02_sfnt_off00013574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13574 17228 bytes
SHA-256: cedab68c69f641ef258e1cadd81d52858a47124f8a95a345d372d36550e4ad45

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