Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd92f960368f8b92…

MALICIOUS

PDF

91.6 KB Created: 2021-08-14 20:43:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8667fb7c2c86052a0a9f8f8851c37ca0 SHA-1: 84aceae12e918efd4d2176f0e2eb8056a57889a1 SHA-256: bd92f960368f8b925ac64b4e5605a570d6fd9ce72f1bb3061627a4206f842e93
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggesting it functions as a link farm. The primary goal appears to be directing users to external, potentially malicious, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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 https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/nd98gqsq3k517bmc75gm3rhtrk/83748677764.pdf In PDF document text
    • http://mini-garden.ru/userfiles/file/43090379195.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8e1a151ffd---pabuvilixobigukanafo.pdfIn PDF document text
    • http://jordanfamilyreunions.com/clients/5/51/51534e3e38036466a76ca8a024fd4923/File/12801905702.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f186dadc529---rorafuverelipadanaretow.pdfIn PDF document text
    • https://miaousland.fr/ckfinder/userfiles/files/88548478611.pdfIn PDF document text
    • http://moda-minulosti.cz/docs/momin/file/31501940289.pdfIn PDF document text
    • http://royalproductsonline.com/userfiles/file/65104975724.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/24430087943.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/e26bec695c97fb5a82e5e0819343a687/15103462161.pdfIn PDF document text
    • http://monktonlionsclubkidscamp.com/clients/9/99/99b8b5517e5fb663501b7ee5137ebf55/File/52448507133.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/8245158920b35c8e1ec72986aa349e70/38177314232.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/61006605908.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/75511461170.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca76c68b18---mijemerepubuvuj.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14dcab3574---79949607928.pdfIn PDF document text
    • http://coclub-us.com/ckupload/files/68731714181.pdfIn PDF document text
    • https://www.medipratik.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608456c3648b0---90732438729.pdfIn PDF document text
    • https://boucherienabli.com/uploads/FCK_files/file/tedefodaj.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/josbg19sg57pru3qg0bmnbbdl2/pewawagen.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606f9c4c79c0c---gamoxowogebazewuputofuka.pdfIn PDF document text
    • http://abnicum.com/files/file/gonidiwexopafuvu.pdfIn PDF document text
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/6321dcc45a3611c595ba5b578d7c9a6c/lefogixutakezu.pdfIn PDF document text
    • https://kisikana.hr/UserFiles/files/kogizakosejedamino.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=druid+animal+oracle+blank+cardPDF 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_off000100a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100A1 17672 bytes
SHA-256: e34afe3be8715239775a4cf9514b2b55aca920ba0363bac292ee21261048c1cb
font_01_sfnt_off00012f52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F52 10600 bytes
SHA-256: a670b29b4cf06e334fc900f0665c69b812af55eca24396cf111ef6446cf82ced
font_02_sfnt_off00014764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14764 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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