Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d67df7f7feac84…

MALICIOUS

PDF

99.2 KB Created: 2021-06-26 02:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 114448f7a7e60739d899b259bfa3fa52 SHA-1: 113853f9fc54eb3ee825c015b5a198693a5ce3c7 SHA-256: 80d67df7f7feac845f117d73a9f2875d8797e90c2b0f6dfd6f6befb99dad0116
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous embedded links, many of which point to compromised CMS upload directories or disposable hosting, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the nature of the embedded links and the PDF structure itself suggests it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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 http://ankaser.com/userfiles/file/79835586468.pdf
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160907458131f8---tumifatebagawewumitaralep.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a963d88d852---70925535059.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/kmg9talo7omganab50qvqd24j0/91020887895.pdf
    • https://naucharts.com/ckfinder/userfiles/files/13498772994.pdf
    • http://toshiba-center.ru/uploads/files/35293504558.pdf
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607852f3a8c78---68081541031.pdf
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609b9ec3f06f4---82421921111.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/dvv94r1g2nfi803qv4bgk2ug15/webasabosafuk.pdf
    • http://www.alexgis.com/siteuploads/editorimg/file/7173606167.pdf
    • http://ankaser.com/userfiles/file/25138987773.pdf
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/hhecghvmfh31vphvad4fhev06f/83675702073.pdf
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160951069d4120---53166671041.pdf
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/lus69ukrq46d6i809ga8euhi93/kitasakadelowegiv.pdf
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/16098f96307c71---62156023982.pdf
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/dafa8r1hsvoeec528ga6cqav35/69032805443.pdf
    • http://sanarina.de/ckfinder/userfiles/files/50525902247.pdf
    • http://meble-tk.pl/userfiles/file/64618344651.pdf
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160850a3cebcdf---93593433560.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bf14f2ab6---82872851095.pdf
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/62247d3e389fce9b2477e0e9a3513cfb/wogaxolugina.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/38669a3baa49f517de9b072822ca90d1/fofojazukixufunijebepisop.pdf
    • http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/160b3c77fa8a2d---lovevurinutezovasobaditam.pdf
    • https://careersourceokaloosawalton.com/files/public/9720606196.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=collecting+tubules+of+kidney
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011d04.bin
a49f029e6d1c2404528f41a5fab95f2c5a0694c0466ccb3ca2ad689cf45398ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D04 19600 bytes
font_01_sfnt_off00014e45.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14E45 16792 bytes
font_02_sfnt_off0001665c.bin
b5128339f66d095af8598fbefbb6853a19e72bc9f5168f98f374233589daf55f
pdf-font-stream PDF embedded font (sfnt) at offset 0x1665C 10868 bytes