Malicious PDF — malware analysis report

Static analysis result for SHA-256 191f5c81285d0b8c…

MALICIOUS

PDF

78.5 KB Created: 2021-11-23 22:50:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: 6c5077bfec40e290ce9280ae148b328b SHA-1: 8ae9d6a41d93a09acd5517a1da5db469ea458cdf SHA-256: 191f5c81285d0b8cf6d9cad072775cf773aed1c517f989d13ba81a1b107ecc9b
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 http://allseasonsart.com/uploads/fck_uploads/file/tikejezeji.pdf In PDF document text
    • http://indianspringhomes.net/userfiles/files/dosikuvetudarexak.pdfIn PDF document text
    • http://dungcumaymoc.com/Images_upload/files/jiburifot.pdfIn PDF document text
    • http://taiwangallant.com/uploads/files/202110120309558035.pdfIn PDF document text
    • http://tienhasteel.com/app/webroot/upload/files/55283400628.pdfIn PDF document text
    • http://geopraxis.it/userfiles/files/47067005432.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16178aca1a7383---46210809604.pdfIn PDF document text
    • https://socukorglutamatmentesfuszer.hu/ckfinder/userfiles/files/62892627229.pdfIn PDF document text
    • https://maria-galland.ru/files/file/todidokozomatibajavi.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/5c3dbaa7fad9e76dca454d3bfe377a61/wominifusevubovejama.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/96058033249.pdfIn PDF document text
    • https://ita.kru.ac.th/ckfinder/userfiles/files/jelemexekuwuxatuteziduxej.pdfIn PDF document text
    • http://kanalizace-ul.cz/userfiles/file/27454414118.pdfIn PDF document text
    • https://efnnma.org/files/file/96722275553.pdfIn PDF document text
    • https://uleshuzataruhaz.hu/files/file/46136610954.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/7b3199ab36df447936e04be191dcddf9/72428210179.pdfIn PDF document text
    • http://iamsong.vn/uploads/files/velufofupowejewalusiliv.pdfIn PDF document text
    • https://carlojans.com/cms/file/62400643589.pdfIn PDF document text
    • http://sns-russia.ru/userfiles/file/44386140340.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/659659506.pdfIn PDF document text
    • http://ayurvedicclinic.org/userfiles/file/86268103918.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/EqozwcbAC44/uplcv?utm_term=ladies+and+gentlemen+the+fabulous+stainsPDF link annotation
    • 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_off0000ce0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE0B 10900 bytes
SHA-256: d73ee7c0b68a516a4c3d5f0e009e182a824b620ecd301d6ffe4a61ffd6af38ef
font_01_sfnt_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_02_sfnt_off0000fd6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD6C 17888 bytes
SHA-256: e212b8590402a9338e5c45828b128e84f80e3143b0892a3e3daa16437f1eb4f5

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