Malicious PDF — malware analysis report

Static analysis result for SHA-256 4af70de7fc9f04b1…

MALICIOUS

PDF

269.1 KB Created: 2022-07-06 16:38:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 57aa431dbaa844ad201d2eacac861857 SHA-1: 07aeba73c640db2bf5cd565e033461938ff6a6bc SHA-256: 4af70de7fc9f04b152cf3bc3ab831e4948fe030a01e1e8247deb7c606f1e1c78
106 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7309

Heuristics 5

  • 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://gluvoob.com/c3?utm_term=hollow+knight+100+percent+speedrun+guide+pdf+free+pdf PDF link annotation
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16215c024d3466---55424988464.pdfIn PDF document text
    • https://tukibasitotaz.weebly.com/uploads/1/3/4/4/134445351/maketapekajagelusi.pdfIn PDF document text
    • https://wonwon.taipei/photo/file/28367330512.pdfIn PDF document text
    • https://wibikemidoti.weebly.com/uploads/1/4/1/7/141718729/ab8b82.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/162a8d45d5982d---ludovogofojasipaj.pdfIn PDF document text
    • https://cet.sk/res/file/xoruguga.pdfIn PDF document text
    • http://www.podunajsko.sk/app/webroot/ckeditor/kcfinder/upload/files/vekakugeraravapararuxoni.pdfIn PDF document text
    • https://nuvojutujapuj.weebly.com/uploads/1/4/1/3/141338793/4812ef69f1067.pdfIn PDF document text
    • https://www.naturecare.com.au/kcfinder/upload/files/tejasisukanonisalo.pdfIn PDF document text
    • https://diburivepepit.weebly.com/uploads/1/4/1/3/141325781/limimudepalotusered.pdfIn PDF document text
    • https://tekulumadon.weebly.com/uploads/1/3/4/7/134767252/wevanagiwalujujot.pdfIn PDF document text
    • http://www.bauernmusikkapelle-stjohann.at/CMS/ckeditor/kcfinder/upload/files/89835803066.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/5b26924e129c30516c8961d1de854461/gotusugilikuzol.pdfIn PDF document text
    • http://cnsgafgl.netsociality.com/upload/files/22617564004.pdfIn PDF document text
    • https://fejomuzuzozasas.weebly.com/uploads/1/3/4/7/134748710/1717742.pdfIn PDF document text
    • https://webdatedepot.com/userfiles/file/pevukanun.pdfIn PDF document text
    • https://vmwarts.com/ecovic/file/60230146653.pdfIn PDF document text
    • https://sebogiwatew.weebly.com/uploads/1/4/1/8/141823926/4454697.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/2022412137148835.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/43298f8b5c59afaad23e044e6c4b0903/21848783389.pdfIn PDF document text
    • http://arndt-fahrschule.de/userfiles/file/6783666637.pdfIn PDF document text
    • https://ridijetovemeriw.weebly.com/uploads/1/3/5/9/135984977/xevetezigisazate.pdfIn PDF document text
    • https://bafalado.weebly.com/uploads/1/3/4/8/134865771/putoje.pdfIn PDF document text
    • https://elemental-ia.com/userfiles/file/vavewulenaxagozu.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_off0003aff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AFF9 13352 bytes
SHA-256: 66dbe36da1178b5eff0fe7bfc5823b01a6ef73a9eeefcb0eb5c2e37ac8a3ddcf
font_01_sfnt_off0003d860.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3D860 19112 bytes
SHA-256: 3f9409579e9e956aa2ef776ec998833b65e34e2fa0770af5b1656e6d34aa33f9
font_02_sfnt_off00040ab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x40AB3 11180 bytes
SHA-256: 252c697a43d3eec46e35363f1f9910c77092559f1278e53389d753c9206b8975