Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c55ebf6a8a1418c…

MALICIOUS

PDF

79.5 KB Created: 2021-09-06 15:57:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9f6be98214586c8c4a74ad8c1373fb6d SHA-1: 72b5c5dd3218906f7866c1cab5fa2b3b2cc8a802 SHA-256: 8c55ebf6a8a1418c98adbe993f4c724ba7a4d5ed30b242668d06d6e694b8ffb6
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains a link farm pointing to multiple compromised websites, likely serving as a distribution point for further malicious content. The presence of numerous links on disposable or compromised hosting suggests an attempt to obscure the true origin and distribute malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/3ec431dfe59b8607af79e4106b1c0407/nuviteniradalolonip.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/fixukafovirerifodoloriba.pdfIn PDF document text
    • http://malopolskiszlakwinny.pl/upload/File/84932553687.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c14ecc76a74---45383683843.pdfIn PDF document text
    • https://fasaac.org/temp//files/mugiwubagebirewi.pdfIn PDF document text
    • https://mimpishio2.net/contents//files/lobapesegozetun.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/5fdbc10aea40b44f9f105b82659f5088/36085068016.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090825f3c288---33552417641.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/galadurukata.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867de89e04d---88680240682.pdfIn PDF document text
    • http://centrostudiapulia.it/files/files/fugifu.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021061300324979.pdfIn PDF document text
    • https://anthonygillant.com/userfiles/file/rowevobexekuze.pdfIn PDF document text
    • https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/kb7dft6ubv8q2dfnoq8mqjp2h7/17195471043.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d2def8850cc---76777184728.pdfIn PDF document text
    • http://sb-78.ru/files/file/2365357374.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/37608523e48ebefce3bb88f0a4e51bd9/bigewofoworasitakoriva.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/17712637930.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/9772a55f7fb1f6dbb6cc49450b1dde93/95149948304.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/16095953955d62---lezomusasunip.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/3703c6f468f2e638fc64000590f5c089/38384141552.pdfIn PDF document text
    • https://vili-al.com/uploads/wysiwyg/files/90249322879.pdfIn PDF document text
    • https://www.nuyew.academy/wp-content/plugins/super-forms/uploads/php/files/cc7750a08f692134b01f8ef077665855/95411271597.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/68733139536.pdfIn PDF document text
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/fazagokimufuratipedafelep.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/5bf017b8053d613005df58b897909a52/likevokavasor.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=math+worksheets+multiplying+2+digit+numbersPDF 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_off0000d064.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD064 11484 bytes
SHA-256: 7caf8e64c1ee49f18946f48cadde6c9fa259fc1873ddc9c1030e5b3b4abdc220
font_01_sfnt_off0000eb1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB1A 17476 bytes
SHA-256: f593abebff59ab7f4dd38131a7b957b58d008f7de6effd6378452b04ea09c142
font_02_sfnt_off000117d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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