Malicious PDF — malware analysis report

Static analysis result for SHA-256 43fff518665b253d…

MALICIOUS

PDF

102.1 KB Created: 2021-06-29 00:17:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 23b651da98927ff378be1d3f81345b92 SHA-1: 746f82a73769317b81cf8b89f583e2a9f914d63b SHA-256: 43fff518665b253d8f5de84aa75ed07fc786924cb15af00c704a3cedcd94a657
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites, suggesting it's part of a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://coretry.ru/uplcv?utm_term=pathfinder+zombie+template PDF link annotation
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c981b9146a3---nojupulisabesivo.pdfIn PDF document text
    • https://roeveragri.ac.in/wp-content/plugins/super-forms/uploads/php/files/2ed4118738c722f77cba49d79c72aaae/73624342858.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/m4udfuhkjro129k5ubcg0q15t3/54211256733.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cc1fee54eaa---pisudawexowavurimuroda.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088a817d5d0b---felubovokob.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609996fd6d40a---gegotuxotixizoge.pdfIn PDF document text
    • http://hopkinshigh1988.com/clients/75739/File/72606840463.pdfIn PDF document text
    • http://mebco.ru/images/file/norekagakoxozolel.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/25062897033.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/0b1f62d31066f7f68b06df1c6666a0db/32577365398.pdfIn PDF document text
    • http://profisystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160793d0c7dce1---906752174.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/67858980959.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa9b0bf867---femixonibudezeligubena.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/v8k9unmmp1ahouv1t2svi54lcl/lebudetivekegetexa.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609a181a3e60d---49579182248.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/33107752394.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/84945248286.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/0c9674658cb7f95ba29ca170ded06715/giguvorivuvivepivav.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/a6743a5265bb9799da90f2d19c1ec0fb/54350717265.pdfIn PDF document text
    • http://fotossc.pl/_files/file/tukarawipova.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16087202141922---fofupaxipoj.pdfIn PDF document text
    • https://www.explosivo.gr/wp-content/plugins/super-forms/uploads/php/files/2f1801159deb5c9146e299cdd0ff2e46/bikorokegijamiko.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/8908255816.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/najubusojatomubanaw.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_off00012a19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A19 18296 bytes
SHA-256: ce1e42b58c3d4bffd21280b0971edac885722bbff5276ad17c3ac0117f699b1b
font_01_sfnt_off00015a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A7D 10796 bytes
SHA-256: 42499ff89620875b3e71132e4c911bd12d9eb20f6689513a5361224ecbd27a75
font_02_sfnt_off000172e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x172E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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