Malicious PDF — malware analysis report

Static analysis result for SHA-256 03d24abdb2bf567d…

MALICIOUS

PDF

205.9 KB Created: 2021-06-28 05:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0ef266113e6b20074013034f50b0fce9 SHA-1: 9f6ea71183a6fcf85d162452d88526007f8afe9b SHA-256: 03d24abdb2bf567de2e760fb39a6d2fb59fab73daa50c6e0e7b1207e6957caef
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress upload directories, suggesting it's part of a phishing or malware distribution campaign. The ML classifier also flagged the PDF as malicious. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9619

Heuristics 5

  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e7e76e3cd---fojezipifosebuwovilireve.pdf In PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/12efce0155352e339456226421f54276/6415097186.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adfdb5ce305---6295747899.pdfIn PDF document text
    • http://jtour.vn/userfiles/file/zexalarusixogaraforameju.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/8cb0a0dce5d89ec0b95bd81f13df4d4b/73102272393.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099fd304a543---22965102175.pdfIn PDF document text
    • http://outspokenholland.com/userfiles/fckFile/20210521132149.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160aa321b32891---vofofapagozaxafowu.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7fa447764---68527069600.pdfIn PDF document text
    • http://verynailscm.com/user_img/file/35940289695.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4b74f30e7---lumikagikepazugexu.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/30e4528ba15fbef30672996d2da5524d/37020966834.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609611b6ae84b---nunazidisomilugugarosof.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/4p2kfehvksfmf9euipht02s396/tixoka.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e3b82c0e6---71611981857.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/29ec65bdb3fcfaa7cd374bb04c4eb719/kividawamakanowakab.pdfIn PDF document text
    • http://cestovni-postylka.eu/userfiles/file/71552797637.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/selox.pdfIn PDF document text
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/9a2a914a7e163dba6f0af8abc835cf76/jegate.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a0a95bb1f73---7916821441.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cd01f17c42---disazeserasiw.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/3762e9b5f1d02b9c8c7418367519eaa6/nisujajimunikowelim.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/16098404c8df4a---64141388602.pdfIn PDF document text
    • http://gursakaryahukuk.com/images/file/laporiked.pdfIn PDF document text
    • http://15fratrowreunion.com/clients/2/2b/2b18ccadde375fd95e9ac2d5db5aaa67/File/pitetowasupuzu.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160c9980b9916d---rusokarudi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=overgeneralization+logical+fallacyPDF 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_off0002c998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2C998 10608 bytes
SHA-256: e1e5658d2f9ba832b9d1b32efd29e6e0721e49923705475b1c1597064fc34ba0
font_01_sfnt_off0002e20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E20F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0002fa21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA21 18316 bytes
SHA-256: 465a53bdb6afcf98b7337a782dc74108c0ede66a16a3e429eab7b2284c613cd1