Malicious PDF — malware analysis report

Static analysis result for SHA-256 2925d3cc8ce4a9c4…

MALICIOUS

PDF

89.9 KB Created: 2021-06-27 06:43:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 12c1f1ba7bcf62510e1bf46b09f268c0 SHA-1: 8097c8f14b7cb7e0324e7f696c8ae4e55b289038 SHA-256: 2925d3cc8ce4a9c46657601f218fc290e0d878ff9e55acaf6533b11bc705933a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The document contains a link farm pointing to multiple compromised CMS upload directories and disposable hosting sites, suggesting an attempt to redirect users to malicious content. The presence of numerous unknown URLs further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://ajivikafinance.com/userfiles/file/kibetumewovi.pdf In PDF document text
    • http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/f4ad2045b0b2d99196ba73cfa298813a/83275424429.pdfIn PDF document text
    • http://www.suffaheducation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dec55be0db---pemapenorunoradusokoxo.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b11477a1e33---50865457223.pdfIn PDF document text
    • http://otelm4b.ru/admin/ckfinder/userfiles/files/98444906448.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/59445941834.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/wemifopadupukexet.pdfIn PDF document text
    • http://refpecsbelvaros.hu/kepek/files/77403288183.pdfIn PDF document text
    • http://perlawarmii.pl/userfiles/file/85931383412.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/82563969227.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/9dmdll8a46aqd2clsoar09vfc5/57634663039.pdfIn PDF document text
    • https://nevisnews.com/userfiles/19847595023.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/wexasetafofunisa.pdfIn PDF document text
    • https://www.horisunmauritius.com/wp-content/plugins/super-forms/uploads/php/files/82604123c1fa014641d425fe1b331ac3/27615747197.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/nixovopitotam.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/768fgk05k7nodeajdtksmrbuj4/26593984850.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/c32a3q80c0hvc3dlg0bldhnim3/bizovifojiwov.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/nckvckoqaoln4r3fl6gago8jpd/wibapidudisut.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/9b09ddd95aa19279b1c6ea91f7b450c1/konuwodosaju.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c5849d6e8---66579724182.pdfIn PDF document text
    • https://www.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082d8ff4e770---tarofonotulevaboxiwepave.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160c9c33649d2b---22980420198.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=native+american+bandsPDF 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_off0000fce4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCE4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000114fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114FB 10548 bytes
SHA-256: 4344a832d9268afa5c9a641d59852ab7ca7415f59b7e4aa8f0c5d7d74d25b344
font_02_sfnt_off00012d08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D08 17456 bytes
SHA-256: 6edcc11de36b7f6f2fd98ef4687cef6552699a87f18651d7be991f1c3c512008

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