Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd7c7757423e6d41…

MALICIOUS

PDF

333.2 KB Created: 2021-12-14 14:58:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-19
MD5: 8e515b1a1ba1b5c81f0eced1dd5d2c55 SHA-1: c08f0379ea8c6913db15a6bed0b2846323d0ccae SHA-256: cd7c7757423e6d41565d13a35590f28fbacd97f032142741beb76f44bd9848ad
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6819

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 http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/ketoritenanirugotoj.pdf In PDF document text
    • https://ehbo-oostkapelle.nl/userfiles/file/84964683325.pdfIn PDF document text
    • https://art-eria.pl/mandarynka/pliki/files/najinerewomopawudanid.pdfIn PDF document text
    • http://hainfelderteich.at/77874358596.pdfIn PDF document text
    • https://tectrongim.com/uploads/file/furobogofofaxof.pdfIn PDF document text
    • http://brette-animation.com/userfiles/file/37975072148.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/zijudupuzupika.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16182fa8057863---sokixuvidulolane.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/4nnm19cf5di9ugb4badlep7g6c/tunepafelageketav.pdfIn PDF document text
    • http://villabrown.it/userfiles/files/xopefuratawenemegukowuke.pdfIn PDF document text
    • https://kottayammedicalcollege.org/CMS/ckfinder/userfiles/files/panijupumobipipapo.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/97519216232.pdfIn PDF document text
    • https://profesa.net/userFilesfile/49296804638.pdfIn PDF document text
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021111116524980554.pdfIn PDF document text
    • https://aporpeter.ro/userfiles/file/zikaz.pdfIn PDF document text
    • http://cukiernia-waltar.pl/qcms/userfiles/file/xagugag.pdfIn PDF document text
    • http://altera.ukrstroyka.com/content/xuploadimages/file/vodozupofoku.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/16172ffc8de8f9---dumosafejidapifiji.pdfIn PDF document text
    • https://kapefashion.com/files/files/xivumerotizopufirig.pdfIn PDF document text
    • https://tecnicadovolante.com/images/file/26811320223.pdfIn PDF document text
    • http://mecateengenharia.com.br/ckfinder/userfiles/files/wanigijutojutibosamiva.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/gavizasosowix.pdfIn PDF document text
    • https://cepatdaftargroup2.com/contents/files/55933743506.pdfIn PDF document text
    • http://195exim.com/datas/files/rezus.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/UsNeCLCzgYg/uplcv?utm_term=mental+status+assessment+nursing+pptPDF 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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004badf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BADF 10568 bytes
SHA-256: ebfd0b25b553620c1ad289e9d2ce6e1245f21ea1a965b80ff3f3e971bd3e5b85
font_01_sfnt_off0004d2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4D2EC 19848 bytes
SHA-256: 17b2e0f810aeb228766dcfee98f521290242c05fa61ecb08f02e9c2a30ad0391
font_02_sfnt_off00050609.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50609 16416 bytes
SHA-256: cfa2c3fbce80cc5607e01af033b793d17c57c214fb1d96e845eedea48cccd336
font_03_sfnt_off00051ca3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51CA3 1780 bytes
SHA-256: cf43ea07d0e14c5dadc3c8d1a3fd6347ba51c91ab3c5d9ef8ee3d45ec84741db