Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4f725aa5728bcc6…

MALICIOUS

PDF

288.6 KB Created: 2022-03-07 13:58:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-02
MD5: eb355176ae9ab0adcbfa9fb67fec5bc0 SHA-1: 73999aaae19ad0361bb2742ef6041662ab366011 SHA-256: a4f725aa5728bcc6581eccc7467563bb57500f1c9d597a6aa8e6b9cbf374f0ee
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7754

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://yubit.co.za/XSRYdR1H?utm_term=adventure+island+2+nes+apk PDF link annotation
    • http://clerus.hu/files/file/zubidabokimem.pdfIn PDF document text
    • http://szjg.hu/images/file/81936941574.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16223c21f7f437---munukimonarazebegefim.pdfIn PDF document text
    • https://jazykovytabor.topenglish.sk/app/webroot/gallery/files/wawenefomomalulemaku.pdfIn PDF document text
    • https://linhancomvn.xelinhan.vn/userfiles/file/lomegewodokukejixi.pdfIn PDF document text
    • http://nepallooms.com/imagenes/file/32364043968.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20220207115216630.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1621c47577c815---xofejulugejetisaxik.pdfIn PDF document text
    • https://www.drukwerkmax.nl/public/admin/assets/global/plugins/kcfinder/upload/files/92729425381.pdfIn PDF document text
    • http://taaltoetsvo.nl/userfiles/file/87968722429.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/rapigo.pdfIn PDF document text
    • https://isabellepieman.com/userfiles/file/69664489082.pdfIn PDF document text
    • http://lienming-rubber.com/uploads/files/202202252247473729.pdfIn PDF document text
    • https://www.gullyracing.it/admin/ckfinder/userfiles/files/38003794264.pdfIn PDF document text
    • http://underbutter.cz/download/foto/19402977997.pdfIn PDF document text
    • http://tarasovfabrika.ru/uploads/file/rufiwezesutipe.pdfIn PDF document text
    • https://shreenathtechnologies.com/userfiles/file/bakebudubusi.pdfIn PDF document text
    • http://serviskytar.cz/kcfinder/upload/files/vunikopog.pdfIn PDF document text
    • https://www.wunderlandovi.hu/kcfinder/upload/files/34221736748.pdfIn PDF document text
    • http://indyztyle.com/ckfinder/userfiles/files/48459420855.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/51535259969.pdfIn PDF document text
    • https://appchecar.com/ckfinder/userfiles/files/senopez.pdfIn PDF document text
    • https://autodesk-v2.emailingmanager.com/uploads/editor/file/logebidujimuguzok.pdfIn PDF document text
    • http://bn-biz.com/userData/board/file/8366769641.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16207a98108ffa---zexokogok.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/tekosuvumo.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 extracted file (font_00_sfnt_off00041536.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00041536.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00041536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x41536 18396 bytes
SHA-256: ec7b55f94e7ef408bdf40a840c51fc61c3ef4d388622ce06a2b5a99ff8369202
font_01_sfnt_off0004446d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4446D 10624 bytes
SHA-256: df78293c5ffbe638c0829058d237888325c6100d8c7b6cdb15942311c4ebae7a
font_02_sfnt_off00045cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x45CEF 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9