Malicious PDF — malware analysis report

Static analysis result for SHA-256 60eaa1b020f891e3…

MALICIOUS

PDF

95.1 KB Created: 2021-08-09 19:42:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 402fc258feb059d379f8f4baec8b276b SHA-1: baf7a5de090444cf6a70a105f3681ffe3b430c12 SHA-256: 60eaa1b020f891e324f7c740ac2ed54034f7211c01b354eff66ccaffaf428cb2
96 Risk Score

Malware Insights

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

The PDF file contains numerous links, many pointing to compromised CMS upload directories, suggesting a link farm or redirection scheme. The ML classifier strongly indicates maliciousness. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics reinforces the interpretation of this file as a tool for SEO manipulation or hosting malicious redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 5

  • 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://webbuilders.com/files/file/69271506262.pdf In PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6997fc9630---4660552892.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/1a4b3e304804b61335bfc81037452471/butir.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7824ba100c---fuvamiponisofiri.pdfIn PDF document text
    • http://lukoilmarine.com/ckfinder/userfiles/files/ravibodakumixobe.pdfIn PDF document text
    • http://longarmquiltacademy.com/fckeditor/userfiles/file/vewerunikakanoso.pdfIn PDF document text
    • http://meimagedance.tw/ufiles/files/natipobodipev.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160b882d497023---toxoso.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609dd0f0870d6---34011062581.pdfIn PDF document text
    • http://rethabise.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607d30cf557f2---buziponedemi.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16091a4a552b40---2766044585.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/j0ciu47d85fib796jsnrovcfrn/92807774885.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/1c459e7a02fd3e55c15937dcaebba4de/natixofubegirekowuwojamam.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/tigodigunomux.pdfIn PDF document text
    • http://livingkaneohe.com/userimages/72000632861.pdfIn PDF document text
    • http://denis-lefebvre-services.com/fichiers/file/59442048003.pdfIn PDF document text
    • https://surupaceanu.ro/ckfinder/userfiles/files/fozanedodevusaxok.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607688ed94582---61883547189.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/32c8b5fb6c16afacc25240f873a918dc/80871356731.pdfIn PDF document text
    • http://superazs.ru/images/news/file/fuduropot.pdfIn PDF document text
    • http://chiengthai.com/file_media/file_image/file/dawim.pdfIn PDF document text
    • http://foodchemsino.com/d/files/lewikoxutomesasi.pdfIn PDF document text
    • http://www.kilincsweb.hu/fileok/file/komidediweben.pdfIn PDF document text
    • http://fhhsclassof70.com/clients/4/42/42ce21dc30e429aa976ba070b22ccf93/File/begukofexo.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2f754665efb389d4344b2c9e21d3b6d3/35611267890.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=acronis+true+image+2019+full+version+with+crackPDF 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
    • https://www.youtube.com/watch?v=OuFoGTDUclcIn 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_off0001099d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1099D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B4 11568 bytes
SHA-256: 7a41f8590217e6eb9e326916312cdf40478ad79106d6ce15a25c49b44fb634b1
font_02_sfnt_off00013d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D33 17672 bytes
SHA-256: 9c8e573925336abfe2c1127cf4e1820560edf8fc73cb2d0b0b309515b2625687

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