Malicious PDF — malware analysis report

Static analysis result for SHA-256 4455d8e5a7b51121…

MALICIOUS

PDF

87.2 KB Created: 2021-10-04 16:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: 9e69356d733b6a476b58108ae6018d0f SHA-1: 57f1c2a532b331e3af137bd446eae58ebea7fa2d SHA-256: 4455d8e5a7b51121d850a6c6a45caffc944ed57ab27b10b8912b19fb9e5ad56b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs, with a high heuristic indicating it's a link farm on disposable hosting. ClamAV and an ML classifier flagged it as malicious, specifically as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://catamma.ru/uplcv?utm_term=title+vii+of+the+civil+rights+act+of+1964+pdf PDF link annotation
    • http://massageindex.nl/images/uploads/gazur.pdfIn PDF document text
    • https://bursaphotofest.org/uploads/files/sepubujof.pdfIn PDF document text
    • http://kalistechnologies.com/userfiles/file/48531190896.pdfIn PDF document text
    • https://guitarenko.fr/img/files/3716623166.pdfIn PDF document text
    • http://tareeapartment.com/user_img/files/zadupuxazokulabebu.pdfIn PDF document text
    • http://tarnava.eu/user_images/file/zibela.pdfIn PDF document text
    • http://regcureguide.com/files/files/pimetamowiwedo.pdfIn PDF document text
    • https://path.mn/userfiles/files/kenadigeb.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/ladajutorowabazine.pdfIn PDF document text
    • https://e-tta.com/app/webroot/userfiles/files/bagojarewivetuwe.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/bivugisisoj.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/60472672180.pdfIn PDF document text
    • http://suliaox.com/v15/Upload/file/20219131016436404.pdfIn PDF document text
    • http://abnigakgdsg.friendship-match.com/upload/files/julaxarakalimominu.pdfIn PDF document text
    • http://neodermclinic.com/file_media/file_image/file/47702491209.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210907_71ABF6C290E84EAA.pdfIn PDF document text
    • http://cudicio.it/images/file/jajiripe.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/58903744911.pdfIn PDF document text
    • http://gainliving.com/upload/editor/file/fabapilesorilunuxogubab.pdfIn PDF document text
    • https://tigaintan.com/contents/files/62539627926.pdfIn PDF document text
    • http://podarox.ru/public/files/26265442672.pdfIn PDF document text
    • https://razredna-nastava.net/files/zakuxobajapitapuv.pdfIn PDF document text
    • http://hermanosgolbano.com/admin/fckeditor/editor/filemanager/connectors/phpfile/pigepanejamoda.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/16152ef4aad912---buletum.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16132be2bdc499---70021414733.pdfIn PDF document text
    • https://daulte.ch/ckfinder/userfiles/files/kofurobutubejuwudaxuri.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_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 11292 bytes
SHA-256: 33525c3ee2d2567b520f7c2718d413197d268785653a8f077c4e58da693c3452
font_01_sfnt_off000108b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108B9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120CB 17792 bytes
SHA-256: 6bf921c2b04fc56955ec1c4a5287941665085953c84d8c838490727a202251c2