Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8c2161a1952907…

MALICIOUS

PDF

337.0 KB Created: 2022-03-06 09:57:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: a87b235d0c3727ae21d162bee85070b0 SHA-1: 03b4bb807ab38d9062376faa09a9af3374032a9c SHA-256: aa8c2161a19529072c9702785ff37efbec7c6085e96781bfb44d53047cb31efd
174 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.5879

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cafij.co.za/XSRYdR1H?utm_term=catheter+associated+urinary+tract+infection+treatment+guidelines PDF link annotation
    • https://sharenkon.com/files/78639334890.pdfIn PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/161ff2af14453d---lugoj.pdfIn PDF document text
    • http://test.currentaffairsfunda.com/assets/kcfinder/upload/files/89965788640.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/10300628106.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/397988340e76dd7ac67b35eecac99071/benad.pdfIn PDF document text
    • http://maximaviajes.com/FCKfiles/file/gimipewerowepobigo.pdfIn PDF document text
    • http://danies.ru/ckfinder/userfiles/files/kafavunadowonevenas.pdfIn PDF document text
    • http://mega-treid.com/userfiles/files/1129198460.pdfIn PDF document text
    • http://na-bytecek.cz/UserFiles/File/42147223043.pdfIn PDF document text
    • http://bikesport-krnov.cz/www/js/kcfinder/upload/files/liwex.pdfIn PDF document text
    • http://www.its-dph.cz/admin/fckeditor/editor/userfiles/file/64825206372.pdfIn PDF document text
    • https://www.tifdip.com/wp-content/plugins/formcraft/file-upload/server/content/files/16209b726d7112---87488030013.pdfIn PDF document text
    • https://atarentacarburdur.com/userfiles/file/solefivogakodikop.pdfIn PDF document text
    • http://oguzlarotomatiksanziman.com/depo/sayfaresim/file/vitemojajuvijetibe.pdfIn PDF document text
    • http://89928386.com/uploads/files/202202180106494300.pdfIn PDF document text
    • http://sethhukumchandschool.com/userfiles/file/xurofilubotimal.pdfIn PDF document text
    • http://cmcthailand.com/ckfinder/userfiles/files/folokuzuwifodid.pdfIn PDF document text
    • http://reside-realestate.de/user_files/files/rilow.pdfIn PDF document text
    • http://hardevel.com/data/files/bagiw.pdfIn PDF document text
    • http://batteryzone.pk/assets/kcfinder/upload/files/ketosipibipojad.pdfIn PDF document text
    • http://baldonimarcostudio.eu/userfiles/files/28350870783.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16201731e50eda---78968040384.pdfIn PDF document text
    • https://pmb.unimal.ac.id/assets/plugin/kcfinder/upload/files/fawinatigubuluriwugowo.pdfIn PDF document text
    • http://nahar-bd.com/assets/ckeditor/kcfinder/upload/files/11260123056.pdfIn PDF document text
    • https://claphamjunction.com.au/wp-content/plugins/super-forms/uploads/php/files/c96ad52bb91d93aa4c90a1eb2e86c9ba/62237335359.pdfIn PDF document text
    • https://techcport.com/files/files/zawep.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20220211045409.pdfIn PDF document text
    • http://www.mgamk.ru/ckeditor/kcfinder/upload/files/kukarejanovinujinexojus.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/1c5fkij51mt2n21r87u0j67bd1/bumakikipepadolorivubeme.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/161f9765690afe---dakipabumajek.pdfIn PDF document text
    • https://mayphotocopydogia.com/upload/files/gulevewulikopa.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/worax.pdfIn PDF document text
    • http://jcsh.bluezp.com/ckfinder/userfiles/files/12859046106.pdfIn PDF document text
    • https://www.ssemusic.com/kcfinder/upload/files/38553066101.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/zafemanomunijugujurutu.pdfIn PDF document text
    • http://www.razitka-conti-trodat.cz/kcfinder/upload/files/98358315924.pdfIn PDF document text
    • https://trystsalonri.com/images/file/38436592733.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_off0004d0a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D0A8 18212 bytes
SHA-256: 275e81387b5a7cdd38335c59be3694d6395d271503ea2fe20d72b9a393978aae
font_01_sfnt_off00050086.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50086 11168 bytes
SHA-256: 10567cc9da9202bf3384bee36306bfaf0dc18f23f98318dc53dbff52898b3e39
font_02_sfnt_off00051a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51A49 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9

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