Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afb249e1a72b1a5…

MALICIOUS

PDF

83.5 KB Created: 2021-10-07 16:05:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 44e5f4dc18835abfcb5dbe72bd2cd20a SHA-1: ad46b9f1346e97c0b5ca1f9607085624864b23ff SHA-256: 4afb249e1a72b1a56acd3d95738620b0d2d283341a9d4b158a981d07373ac06a
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. 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://sterlingsez.com/ckfinder/userfiles/files/32087600865.pdf In PDF document text
    • http://demo-jesma.shopcloud.es/ckfinder/userfiles/files/jolevesoguxulorutu.pdfIn PDF document text
    • http://cnokorea.com/userfiles/file/60679236898.pdfIn PDF document text
    • https://testgit.begurholidays.com/uploads/userfiles/files/89373688733.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/8c8c9ee14e43d0b95260c0be25ec3de3/90706698992.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/giluwusag.pdfIn PDF document text
    • https://namhunglogistic.vn/site/files/lufokipowapipufit.pdfIn PDF document text
    • http://35ct1.com/images/ckImageFiles/files/8070626298.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133d477325fb---37240092278.pdfIn PDF document text
    • http://tsradviseurs.nl/mailing/images/photo/file/gojidefiriw.pdfIn PDF document text
    • http://hoadondientu-ptp.vn/images/ckeditor/files/jokuru.pdfIn PDF document text
    • http://pspectr.ru/userfiles/file/9061640825.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/94950524144.pdfIn PDF document text
    • http://turar-mussin.com/userfiles/File/wupunexutalonapelefi.pdfIn PDF document text
    • https://dazhonghua1688.com/ckfinder/userfiles/files/71809110104.pdfIn PDF document text
    • http://willettelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/39423151685.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16150fb603389d---83698301437.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/49302350661.pdfIn PDF document text
    • http://progettogeometra.it/userfiles/files/56614898551.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/93383537743.pdfIn PDF document text
    • https://praktijkbinnenstad.nl/file/68655364566.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16137c813d22bc---mugavikeketizilosuvusure.pdfIn PDF document text
    • http://nwatchonline.org/userfiles/file/94101876973.pdfIn PDF document text
    • https://sssmri.com/ckfinder/userfiles/files/84212673278.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=spreading+christmas+cheerPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD56 19440 bytes
SHA-256: 6e5970cc485921b832d2b61d890c1fd7d03057556515e655ce8b6fa9f353e381
font_01_sfnt_off00010f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F6A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12781 10872 bytes
SHA-256: cf113da2421d691673c378771a62caf6f09250213f4148db0a99c184305d454f