Malicious PDF — malware analysis report

Static analysis result for SHA-256 1911acbf34105639…

MALICIOUS

PDF

128.4 KB Created: 2021-07-21 01:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: 1f78444882e76b723a78b2461f93e019 SHA-1: 85f13fe293871666bf696028ab24a7cdede9311d SHA-256: 1911acbf34105639e363c759d8ff29aeed01ac19d18202efd64d09065ca740ca
96 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 5

  • 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://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/r71u4ce73u7ak24q2fta460ai1/mevageborag.pdf In PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/qpgopo5a5ovk9bjvdauc64rk7p/94622036053.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/d19e8b8ff60a6700a60d668a96056b93/naxizapuvidupodajukivos.pdfIn PDF document text
    • https://betalinktech.com/blmedia/file/27339873118.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/350c01be3141b8fdfe2734483af8cfe2/galenetevupuxevep.pdfIn PDF document text
    • http://qataminational.com/uploaded_files/userfiles/files/390076894.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086fcd13e608---71040601423.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607837e4c964b---81981528901.pdfIn PDF document text
    • http://soflocops.net/clients/81266/File/wutinabiduvakelaju.pdfIn PDF document text
    • http://arcdesantmarti.com/biocop/Images/images-editor/file/lamusunababipilinizifidog.pdfIn PDF document text
    • http://studiofapas.it/userfiles/files/24891405805.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/6a5b3ee2fc1e4fe12e04fb433a510976/85258872690.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b60a835afa2e98d6d9e74f96ac5493ad/bilijisipudimikali.pdfIn PDF document text
    • http://mega.kz/media/upload/files/josot.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607678b6b5afe---18864513759.pdfIn PDF document text
    • http://www.siscbolivia.com/admin/uploaded/fck/file/bemak.pdfIn PDF document text
    • http://yuanyoujie.vip/userfiles/file/92223054022.pdfIn PDF document text
    • http://turskazka.ru/ckfinder/userfiles/files/fiwixetoxiramevutovo.pdfIn PDF document text
    • http://rauvuonsach.com/images/uploads/files/gamedoleririjivibeke.pdfIn PDF document text
    • https://codecs.ro/images/file/zikikidimabaw.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/52347298516.pdfIn PDF document text
    • https://ive-cal.it/file/mamopulibuxisubunuze.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/122dab6cb1003d17f70dd97c920d07cd/tebejuredan.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/160959668e4805---sefetininijur.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=fibre+to+fabric+by+corbman+pdfPDF 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_off000193ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x193ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001ac04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC04 10796 bytes
SHA-256: a806bd55c9c560df5a7b9b3c8d1a16874b3d03a41996fa9786d6922fe07ec485
font_02_sfnt_off0001c4aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C4AA 18140 bytes
SHA-256: 2d6438674e0dd3fe7adc69f0be2b514127a70a561380d0f152352cc08c10db25