Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af37c9400bcb6cc…

MALICIOUS

PDF

79.0 KB Created: 2022-04-18 16:33:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 12d93ec048ff3f3d9600c721588cca7a SHA-1: 03e42d66bd3f62a40ef697c3882cdcd3fc796384 SHA-256: 4af37c9400bcb6cc22b156618e6a013b06e77f5a09c0c0592148235d56d60fe5
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://colod.co.za/YmrXLWy8?keyword=does%20colorado%20boulder%20give%20scholarships PDF link annotation
    • http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/wolezalimonunit.pdfIn PDF document text
    • http://www.ipsc-pv.cz/kcfinder/upload/files/14857428031.pdfIn PDF document text
    • http://ywjxz.com/userfiles/image/2022/03/file/43177892512.pdfIn PDF document text
    • https://basalolevezuw.weebly.com/uploads/1/3/1/6/131606508/dogepuxi.pdfIn PDF document text
    • http://vet-spb.com/userfiles/file/miranalejogidiwoluvi.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1622167a7a921c---28310181478.pdfIn PDF document text
    • http://hzhuacui.com/images/upload/File/52642779156.pdfIn PDF document text
    • https://kuzupitodewi.weebly.com/uploads/1/4/1/5/141513734/tenan.pdfIn PDF document text
    • https://www.cbrn.tj/nrsa_system/ckeditor/kcfinder/upload/files/vemusoja.pdfIn PDF document text
    • https://cortado.funeralinnovations.com/copilots/upload/files/75020873182.pdfIn PDF document text
    • http://www.dkmodels.net/ckfinder/userfiles/files/pobixugeko.pdfIn PDF document text
    • https://patijunig.weebly.com/uploads/1/3/0/9/130969449/nejapivebetevug.pdfIn PDF document text
    • https://xogozawof.weebly.com/uploads/1/3/4/5/134525987/265257771111.pdfIn PDF document text
    • http://personaleducador.com.br/ckeditor/kcfinder/upload/files/resavatopejavumukujibur.pdfIn PDF document text
    • http://likebarcode.com/image/files/20220306_164708.pdfIn PDF document text
    • http://huarui-bio.com/upload/files/84612046574.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/pogosujol.pdfIn PDF document text
    • http://www.kickcommerce.com/userfiles/file/51629393931.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_off0000cd00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE512 17376 bytes
SHA-256: 3cbeceba23591e1f77d7ff6ae477fc4965a7a4bcf651ee9d57d25a7dbb0f9d62
font_02_sfnt_off000112a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A4 10900 bytes
SHA-256: 78add3d83c94293a66f5f622df3e2cccc8597d1b992687ccc29c4c3f3dce7909

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