Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99565c7ab5e6bab…

MALICIOUS

PDF

338.9 KB Created: 2022-03-08 02:30:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-13
MD5: 00443f3852a6fcc31118157952de163e SHA-1: b0617846fee6ccacd0649af50d1f08bfc179f810 SHA-256: f99565c7ab5e6bab12aa725250f606f9eaf2ea6c02edb7049b883dd38045ec13
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and multiple external links, including one identified as an SEO redirector for "free printable alphabet letters pdf". The presence of embedded JavaScript and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest the file is designed to exploit vulnerabilities or deliver a phishing payload. The ML classifier also flagged the PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5565

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://fecuq.co.za/XSRYdR1H?utm_term=free+printable+alphabet+letters+pdf PDF link annotation
    • http://dilimkebab.com/userfiles/file/fuwusogujiguz.pdfIn PDF document text
    • http://dc-0b9b12d700ad.collinite.pl/userfiles/file/valab.pdfIn PDF document text
    • http://www.smartusb.info/images/library/File/45266183980.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/vdj9ptebcocil5n6njh4tjhj2k/81619192200.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1621f30fc74159---samukogukonazunesemokap.pdfIn PDF document text
    • http://maquetland.com/v2/images_articles2/files/64928730439.pdfIn PDF document text
    • http://orthodoxvaidikasanghom.org/userfiles/file/80100261618.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1620f73cc34d50---nulufuxikorarazog.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/fezulexiwemi.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202203070516352067.pdfIn PDF document text
    • http://applyforloansnow.ca/site-uploads/29168195700.pdfIn PDF document text
    • http://gopay24.pl/app/webroot/js/kcfinder/upload/files/21290963839.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/lerodaduwadoros.pdfIn PDF document text
    • https://hopadive.cz/ckfinder/userfiles/files/12842443460.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/lebikitonozijakas.pdfIn PDF document text
    • http://skinct.com/upload_file/file/Fl202202220552139805.pdfIn PDF document text
    • http://icon-studios.com/userfiles/file/32655746071.pdfIn PDF document text
    • http://thepvunamduong.com/media/ftp/file/86272555587.pdfIn PDF document text
    • http://mp-journal.com/media/file/depemu.pdfIn PDF document text
    • http://www.salac.cz/ckfinder/userfiles/files/somesu.pdfIn PDF document text
    • http://coral-travel66.ru/admin/ckfinder/userfiles/files/digemusibodagige.pdfIn PDF document text
    • https://tigaintan.com/contents/files/91198261568.pdfIn PDF document text
    • https://twojeloty.pl/admin/kcfinder/upload/files/zubefuzukekabilajabit.pdfIn PDF document text
    • https://vietrocknet.org/app/webroot/img/files/zukupanimubi.pdfIn PDF document text
    • https://ribaczpeter.hu/files/file/62571712243.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20220223015155.pdfIn PDF document text
    • http://foto-preiss.at/upload_files/files/97761878455.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/a14d729b4cfcf9e4ce0c9ed4b0582c1d/vosedigulamixajarabubozij.pdfIn PDF document text
    • http://detskie-platya.moscowfashion.net/content/xuploadimages/file/1209093974.pdfIn PDF document text
    • https://hometutorsdelhi.com/userfiles/files/lefamige.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/161fb0dfbcdc82---78313258006.pdfIn PDF document text
    • https://idroilektriki.gr/files/file/kufajinivuxove.pdfIn PDF document text
    • http://tlbafw.com/include/upload/76679693978.pdfIn PDF document text
    • http://haithuanphat.com/uploads/files/nememidana.pdfIn PDF document text
    • https://mingyi-lock.com/data/file/userfiles/files/dobezudizok.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1620eb657e4f5d---67202700395.pdfIn PDF document text
    • https://taechoclub.com/FileData/ckfinder/files/20220221_72C7719FA176A971.pdfIn PDF document text
    • http://gr-chem.com/upload/files/sepumepavos.pdfIn PDF document text
    • http://www.chestheart.org/assets/ckeditor/kcfinder/upload/files/77452568054.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/162205ce22e447---gekigumufudededapuxesig.pdfIn PDF document text
    • https://www.notusweb.com.br/ckeditor/ckfinder/userfiles/files/24933580931.pdfIn PDF document text
    • http://nislamengineering-ltd.com/assets/ckeditor/kcfinder/upload/files/duxolakozo.pdfIn PDF document text
    • https://avflash.nl/upload/files/sasimosefefakitu.pdfIn PDF document text
    • http://stavebnevyrobky.sk/www/upload/files/64994999103.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
    +3 more URL(s)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004daaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DAAA 18368 bytes
SHA-256: 840fb0409579ebe9f2589ff70e3de13b520ab67b8533225661875c7cba1f5610
font_01_sfnt_off00050a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50A60 10592 bytes
SHA-256: 8d2b39044daf4f11697d8fbab5d7468b2bdbd7b5cc40b3e5a07324d6383654c7
font_02_sfnt_off00052230.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52230 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9