Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc0227cf597dcffd…

MALICIOUS

PDF

83.3 KB Created: 2021-08-31 22:55:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2e5ea10306316ddeda94eaff8d962320 SHA-1: 155958eac7b301b848a489f7fbc7a88356bbcb9c SHA-256: dc0227cf597dcffdf5cb53735bb2af5de74c52fc2939453e3b73c33fdb6e9c6f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, with many embedded URLs pointing to compromised WordPress sites and other potentially malicious PDF documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure and numerous links suggest it's designed to lure users to external, untrusted resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • 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
  • 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://dammesliepas.lv/ckfinder/userfiles/files/45923794245.pdf In PDF document text
    • http://fibertechnique.com/tmp/file/vabobemexagonamutulodovi.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/sobatetoparuwajutagel.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9366f90e8f---rarixigizopufesiz.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/nedoz.pdfIn PDF document text
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/249b362514345f373fff1a92cad61091/dewojusidakinekufuj.pdfIn PDF document text
    • https://www.institutvzdelavani.cz/files/40833737267.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/1998862529.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-15/20210515055255855975.pdfIn PDF document text
    • http://sva-jeanroze.com/xmedia/file/riratotusumigizi.pdfIn PDF document text
    • http://grossfamilyreunion.com/clients/0/00/00c8ca1d7e0432e0ca4c178cf0a97985/File/46802598603.pdfIn PDF document text
    • https://btsmstlucia.com/atomicsteps/upload/userfiles/file/vemalimedenugamilaka.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/95340536134.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160730f57d821d---mowuragekakamajutamave.pdfIn PDF document text
    • http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611306f49167a---14711408350.pdfIn PDF document text
    • http://michelschuurmans.nl/images/uploads/file/39858584447.pdfIn PDF document text
    • http://teplorium.su/userfiles/file/juxixuzadobugola.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e36543fda---99292252362.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c971875c6d---83899271240.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/8140be6402e8d12de1e1a59a44aa31a6/fewisewopagijon.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607a72df6bb0d---bapuzo.pdfIn PDF document text
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/f8865b0f89cde9c5c3956da81f7cb737/zesojoxozokow.pdfIn PDF document text
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9356da0e4---23669456213.pdfIn PDF document text
    • http://dermaktif.com/imgup/file/zunezodosapafedi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=promotion+recommendation+comments+in+appraisalPDF 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_off0000e5a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5A7 10676 bytes
SHA-256: f231bc9e0f457c80bc5b6ab9b0b6742ad8e6f9ed873af6ce220cf7b761c4f2d6
font_01_sfnt_off0000fe14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE14 15940 bytes
SHA-256: bffea0b7a7865103956bc5b011e1e15b327597f480c4504c0833286c57facb56
font_02_sfnt_off00012677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12677 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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