Malicious PDF — malware analysis report

Static analysis result for SHA-256 3020bddf3b829aa7…

MALICIOUS

PDF

94.7 KB Created: 2021-07-07 07:21:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: c9ab611b013b7b57386d80c9438a36eb SHA-1: 01faf953faa5cd96cb7864cfdd6e3452cb886cad SHA-256: 3020bddf3b829aa7e4eddb038bd317c252dc337770a29ccac66bb977ff5c730b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised websites, likely for phishing or SEO abuse. The presence of external URIs and links to compromised CMS uploads suggests an attempt to distribute malicious content or redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://wastran.ru/uplcv?utm_term=nmap+subnet+scan+example PDF link annotation
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/nd84ciq58hef8dgov66kmaqjra/virujaraxusuz.pdfIn PDF document text
    • https://luminex.pl/upload/file/jozedipufe.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/77a08c3aa1ba97953803252da32c45df/45602755595.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f98d209277---rokedoverinoduzebud.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/22718806229.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607952482f988---molunigovuweko.pdfIn PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/f6205b132c2b874f25bccde62bdea80f/42875013772.pdfIn PDF document text
    • http://aksaxena.com/bpms/includes/fckeditor_uploads/userfiles/file/46875258841.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/lipusaxisejatexo.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/445b8f3eec428936cbcc74fab0e3c994/95262685335.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b92376726d---7694970903.pdfIn PDF document text
    • http://alvasari.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca6f3498ba---77146538091.pdfIn PDF document text
    • http://fkhd.cz/data/img/22177273941.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/2d41fc94e8953cb949af270bd72634a4/valela.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/t00olltroasgs5ras7fa5456il/dadotalivusopusu.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/646fa28825ec9c729375983551099048/dabebidulebibejada.pdfIn PDF document text
    • http://fly.no1-yes.com/userfiles/file/gikovupujaxawokalel.pdfIn PDF document text
    • https://arhometutor.com/userfiles/file/finalifobejujerazedomag.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/vixedemumobotebenabav.pdfIn PDF document text
    • https://vieclamhanoi247.com/upload/files/saxuxazoruwosizakafabej.pdfIn PDF document text
    • https://davaocarrental.com/images/file/paxofuzis.pdfIn PDF document text
    • https://visaonline-vn.com/wp-content/plugins/super-forms/uploads/php/files/ud78vu7rg60mlqb3bd1o8u0hgp/35292481251.pdfIn PDF document text
    • 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_off00010deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DEB 10540 bytes
SHA-256: 9ff0565b47e27bbf7ea2453e8d1b2591d200e7e45565ee83314f134d68806706
font_01_sfnt_off000125c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013dda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDA 18028 bytes
SHA-256: bf66932d7dd6331201f79e5de0d479de526708395f10359ebf972be18978d8e1

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