Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0c853e76133c87…

MALICIOUS

PDF

62.0 KB Created: 2021-09-27 01:52:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 13cdbfc27d305baa8d27e77429739aeb SHA-1: b1584c7a5d9a89bd0d37bb064d8e3f39aa4dbd13 SHA-256: 9b0c853e76133c871860a4990182b2253fa5632ffc91b4b070c498d9ad511038
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as a phishing trojan by ClamAV. It contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the overall structure and URL distribution strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4719

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
  • 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
  • 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://wastran.ru/uplcv?utm_term=can+you+make+music+on+your+phone PDF link annotation
    • https://bibonatura.hu/ckfinder/userfiles/files/bokufosevatixeruneban.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161344ec92dec5---95949018811.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135ca0bc8c92---disigabudujuremavama.pdfIn PDF document text
    • https://hotelcorona.ro/files/92219628043.pdfIn PDF document text
    • http://cmorshomecareassociates.org/uploaded_files/userfiles/files/24275561765.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20210906215042.pdfIn PDF document text
    • http://wxbeimei.cn/upload/ckimg/files/202109221809571721.pdfIn PDF document text
    • https://tradingcall.in/ckfinder/userfiles/files/debufidokozera.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/73593830638.pdfIn PDF document text
    • http://geoass.eu/userfiles/files/23409836311.pdfIn PDF document text
    • http://raovat.coi.vn/uploads/userfiles/file/30092330729.pdfIn PDF document text
    • http://synfarm.com/upload/files/muzuwexitewuxobisivafabap.pdfIn PDF document text
    • https://812423.situshoki1.com/contents/files/11957411448.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/55a5ff7598b1bd84ae882ac40706e765/97086181163.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b7d95bfa40---fitawuwozafawobomag.pdfIn PDF document text
    • http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613e224d78562---27317156874.pdfIn PDF document text
    • https://artbynela.com/uploads/file/25747717622.pdfIn PDF document text
    • https://cantarefides.ro/admin/userfiles/file/mavogedapolatusowewefon.pdfIn PDF document text
    • http://dayuntang.com/assets/uploads/ckedit/files/20210914141811.pdfIn PDF document text
    • http://ducnhua.com/upload/files/32368784763.pdfIn PDF document text
    • https://gsm.company/ckfinder/userfiles/files/juvobagiso.pdfIn PDF document text
    • http://crisismobile.com/ckfinder/userfiles/files/nezisi.pdfIn PDF document text
    • http://hostingureitings.lv/uploads/userfiles/files/jirinogatenugelabudewi.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/fofixazipibebej.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/3cf8bd05234ac120025a0dde64a96fba/lidosebojabudopedorabu.pdfIn PDF document text
    • https://cissud.eu/uploads/ck_editor/files/lelemavajuni.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b36c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36C 10832 bytes
SHA-256: ca84720932de77dd8301937b819a48539c8efd7956501f8e7c14652618ad2f53
font_01_sfnt_off0000cc44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.