Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb098d4e1cfd900c…

MALICIOUS

PDF

84.8 KB Created: 2021-07-07 20:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 250e5bb3e289e1f13ed1688960c0be5f SHA-1: 7b0b24fec231fe1f037010450d57bf442da8d670 SHA-256: eb098d4e1cfd900c7c5fee5bb205d72e0c169dc1737e797bfb9cfad4de054341
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other disposable hosting. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://etonbio.com/newsLetters/images/file/85598642239.pdf In PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/1df51779fb3c7d6bd444df0e54b5da9d/89865769919.pdfIn PDF document text
    • http://irishheritagesociety.net/clients/7/7f/7f3653e4c5d791bf76f28d2bf9929747/File/91823888700.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/64cf0bc8f01f3e3224123d454098474f/fidogetijimabaxidoti.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0c3a34fe5b---litari.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/2offvsgljh37cva5tosgr2paqv/38907002216.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4da18102e3---2704997099.pdfIn PDF document text
    • http://ladue69.com/clients/876446/File/tidanokakaxisafuxit.pdfIn PDF document text
    • https://wagaskar.com/media/25410236928.pdfIn PDF document text
    • http://www.multigacos.com/admin/uploaded/fck/file/74828146038.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/2d1ae52abf951bf9c95010239045a34b/wagidevexu.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/a3b2ff670b5091a006e133abe546fcdf/ridovubilezarefozitenubuj.pdfIn PDF document text
    • http://dichvu12h.net/userfiles/file/85515231682.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/48961014588.pdfIn PDF document text
    • https://lea-inc.com/wp-content/plugins/super-forms/uploads/php/files/a723bc8a07af965e1a3a7d3b8e8d3ccd/bikasikabilukivi.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d05ce2dd6af4272d2fbdf0050ed21b6b/84983254114.pdfIn PDF document text
    • http://mnogonomerov.ru/uploads/file/zumigulanojebapemonirot.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/1f691f9957836dff77f77d5c57313de6/xemoxevexet.pdfIn PDF document text
    • http://studiophotosfashion.it/userfiles/files/27277469144.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acedbcb41f6---80667917598.pdfIn PDF document text
    • http://jkmdc.com/aversystem.com/userfiles/file/62996574801.pdfIn PDF document text
    • https://ildiko-szepsegszalon.hu/userfiles/file/duseximizaf.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/f654d461ebfbac656fc8bc1b7376f739/35290504005.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=present+continuous+be+going+to+willPDF 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_off0000e745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE745 18044 bytes
SHA-256: 91cb84b50f0fb7a74b36daba76ce96d0b264560d8782c5fa88e323b326a91451
font_01_sfnt_off0001153f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D56 10572 bytes
SHA-256: df08c9483cd3c644d33af77ea758e27a70c546eb49b1ef1ab7f60aaac30ce84f

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