Malicious PDF — malware analysis report

Static analysis result for SHA-256 f991675b2b13b8c7…

MALICIOUS

PDF

84.0 KB Created: 2021-09-18 18:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 820965d8387b8e13f92743d222226e09 SHA-1: b4ce015b6cbb611f920a40a8e76cbc627f9a9159 SHA-256: f991675b2b13b8c7527923ad4f21909d79e55f1687e73b26c51a9a774f8e8f87
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://catamma.ru/uplcv?utm_term=how+to+transfer+pictures+from+android+phone+to+iphone PDF link annotation
    • http://kk-gorenjska.si/uporabnik/file/jobom.pdfIn PDF document text
    • http://romengo.com/ckfinder/userfiles/files/38541893441.pdfIn PDF document text
    • http://galettedesrois.eu/userfiles/file/27065362173.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/notowevirowixusizovevoji.pdfIn PDF document text
    • https://santa.my/images/users/00000000/files/nepekupek.pdfIn PDF document text
    • http://cisseo.net/userfiles/files/96370287663.pdfIn PDF document text
    • http://pijntherapie.be/uploads/files/87730174449.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613f42d526712---muxujakogox.pdfIn PDF document text
    • http://clairvoyantinfotech.com/demo/images/pumulevogagulunup.pdfIn PDF document text
    • http://mytrangroup.com/uploads/userfiles/file/23518814117.pdfIn PDF document text
    • http://captaincook.hu/userfiles/file/pimutewevusone.pdfIn PDF document text
    • http://vakantie-noordlimburg.nl/ckfinder/userfiles/files/wolemoge.pdfIn PDF document text
    • http://kimyasaldubeller.com/upload/ckfinder/files/lasimosagibu.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/e04784ddd4fe283f6adfe412f218fdfa/vasevefudenupi.pdfIn PDF document text
    • http://hidrometa.com/images_upload/files/guvomotutogugimod.pdfIn PDF document text
    • https://beta.nhatthiengroup.com/files/uploaded/files/famepasafegene.pdfIn PDF document text
    • http://donauwell.at/userfiles/file/40539515912.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/84843717617.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/51315597951.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/16139b46ebcfcf---62832249953.pdfIn PDF document text
    • http://rlangkhan.com/upload/userfiles/files/mesuviwuni.pdfIn PDF document text
    • https://sodigital.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613843110aac2---13757476995.pdfIn PDF document text
    • https://unosms.us/userfiles/file/31727351839.pdfIn PDF document text
    • http://www.polni.si/Images/files/87027477723.pdfIn PDF document text
    • https://hantverksakuten.se/ckfinder/userfiles/files/62985646796.pdfIn PDF document text
    • https://plasy.com/uploads/file/seludetaserawidubo.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_off0000e237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE237 11016 bytes
SHA-256: b9512f7c06f9040245f01b538b9bfb00f2bd3aadec465843edc84b67029ec7cd
font_01_sfnt_off0000fbab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBAB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000113bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113BD 17880 bytes
SHA-256: ebfdb31eb08f75af78fbe2c0fa4712b74df7cbbe330c7ab1fddb29bed72cde5a