Malicious PDF — malware analysis report

Static analysis result for SHA-256 88bda53d6d932fd9…

MALICIOUS

PDF

331.9 KB Created: 2022-03-06 17:14:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-02
MD5: 76427ec529c0c658243f1a71f6bb0db5 SHA-1: 59a801b94a395afe38058737bc8499af301fc8e5 SHA-256: 88bda53d6d932fd94565ae3ca5e93b617aca7001d9275381349ab041726aa79b
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6817

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://czus-lukasa.sk/userfiles/file/79868374442.pdf In PDF document text
    • http://ekouklid.eu/UserFiles/file/bajefamapulegaxebebomonu.pdfIn PDF document text
    • http://hoteldanang.com/uploads/images/files/kizoxutuzexo.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202202062259249351.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161fec7e61c464---riwotow.pdfIn PDF document text
    • https://dogudokum.com.tr/panel/kcfinder/upload/files/13337229665.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/90827013537.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/4a4ef8b35b44e0f9c338a333e1bee78a/2871759182.pdfIn PDF document text
    • http://webursitet.org/kcfinder/upload/files/45699403797.pdfIn PDF document text
    • http://vaithun.net/upload/files/17652168895.pdfIn PDF document text
    • https://dubigroup.com/admin/fckeditor/editor/filemanager/connectors/upload/file/66706384149.pdfIn PDF document text
    • http://affichage-comevents.fr/kcfinder/upload/files/zolovaxalo.pdfIn PDF document text
    • http://www.stsmcc.org/www/js/ckfinder/userfiles/files/36830125576.pdfIn PDF document text
    • http://yanlixin.com/UserFiles/file///gekegutop.pdfIn PDF document text
    • http://kpglearningbox.com/assets/kcfinder/upload/files/veluselipifadul.pdfIn PDF document text
    • http://ipsc-pv.cz/kcfinder/upload/files/zopanugawibe.pdfIn PDF document text
    • http://www.jw-kids.jp/kcfinder/upload/files/76680367499.pdfIn PDF document text
    • https://www.zwaanshoek.info/gibreto-cms/xcrud/editors/kcfinder/upload/files/subuves.pdfIn PDF document text
    • http://sibaco.ru/ckfinder/userfiles/files/83644358714.pdfIn PDF document text
    • http://sabotage-rockgroup.ru/upload/files/xamofaxipiku.pdfIn PDF document text
    • http://bizzarro.be/admin/kcfinder/upload/files/janapifin.pdfIn PDF document text
    • http://srilakshmienterprises.net/uploads/76263219126.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/mazefibapes.pdfIn PDF document text
    • http://at1apigroup3.com/contents/files/69664265858.pdfIn PDF document text
    • http://thuexe7cho.vn/upload/files/93288865319.pdfIn PDF document text
    • http://phutungotodungha.com/img/files/weduvadow.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1621acb89dd418---97800062815.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/3da83d4491eeb910b33a6162b2a957ae/36304959643.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20222111659215082.pdfIn PDF document text
    • http://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1620a3e1802053---xebefug.pdfIn PDF document text
    • http://avvocatoandreabruschi.it/userfiles/files/lilomujidebewakivopike.pdfIn PDF document text
    • http://hoachattn.com/image/files/lolixizefelagamomapu.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16212bb17499c8---13218355046.pdfIn PDF document text
    • https://tunguoilon.tunhua.vn/ipp/images/uploads/files/damuwinonevevifabiwuv.pdfIn PDF document text
    • https://andana.us/files/files/12351165853.pdfIn PDF document text
    • https://pieseautocomenzi.ro/userfiles/file/80383757956.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/b4e57f23d56effa6c59a8940907c742b/tezigulufadoz.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161fd851f3195c---dimigafazitogasegizi.pdfIn PDF document text
    • http://kickstartfintech.com/ckeditor/kcfinder/upload/files/97226649714.pdfIn PDF document text
    • https://cafij.co.za/XSRYdR1H?utm_term=mazda+6+android+auto+australiaPDF 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 extracted file (font_00_sfnt_off0004bf2c.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004bf2c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004bf2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BF2C 19156 bytes
SHA-256: 9e149c1f4493780d34ad0aa8b2eb1ca287d8f0056f144bda671f023a4d5dd7c0
font_01_sfnt_off0004f10a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F10A 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off0005082a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5082A 10428 bytes
SHA-256: 25157a94ed8ffa550b2b6df69987d3121554da07d6a30183dbb2d18e7598880a