Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d62c27564255482…

MALICIOUS

PDF

98.8 KB Created: 2021-08-21 13:10:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 243e287bf2771b648f8f54416efd8c04 SHA-1: bf6fa35e42a6e8205746d239d2bcda2c5db3e024 SHA-256: 0d62c27564255482475cdae367c4959d00fd8c7c3144baed1c94538086881354
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to numerous URLs, many hosted on compromised WordPress sites, suggesting an attempt to manipulate search engine results or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://artside.org/data/temp/file/bonugigitomedafuko.pdf In PDF document text
    • https://faresaldabbous.com/uploads/files/zijuwodolujuzenux.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6e184d2e4---vutugakatobopupijunerajo.pdfIn PDF document text
    • http://bbdecontra.com/userfiles/files/nirufivamizikep.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/161065e67c4bfd---79342403927.pdfIn PDF document text
    • http://fultonhighschoolclassof1977.com/clients/a/ad/adf64365ba34d951c098eb677b062caf/File/renipogasuwolitopate.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160c6f890892dd---jelitexelaguzujiribikokar.pdfIn PDF document text
    • https://ewastexperts.com/userfiles/files/91172923514.pdfIn PDF document text
    • https://sport-jicin.cz/dokumenty/zufefoxekuxonaravu.pdfIn PDF document text
    • http://autoneza.cz/UserFiles/File/dazumozakoxuvarisu.pdfIn PDF document text
    • http://vodnik48.ru/content/file/fexiru.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/7eb7622e2f83309ced4bbbece02e184b/18452117629.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/xaforujajesejefirutir.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/gitizuk.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/xasuletatisuzekoli.pdfIn PDF document text
    • https://angelsstaff.com/uploads/file/tawexu.pdfIn PDF document text
    • http://webinaris.training/ckfinder/userfiles/publics/files/86145723562.pdfIn PDF document text
    • http://bbgannualseminar.com/clients/6/60/607ac775fa755cf068047886b2bbe24d/File/dodaxaxevekud.pdfIn PDF document text
    • https://tavio.ru/files/file/30891259525.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/0f068ad2c78e0244a7de11070ad6b706/zipinejekikofawune.pdfIn PDF document text
    • http://drzwiukryte.pl/userfiles/file/zilexuxelaj.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16083950012226---wuteziza.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160869ade350a0---nofafasa.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/b75cff3afc8a79ede5dc520eca34db60/88294779643.pdfIn PDF document text
    • https://bursakaynak.com/userfiles/file/rotobonotiwidilejoxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=matematicas+3+eso+material+fotocopiable+santillana+solucionesPDF 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_off00011827.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11827 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13039 18744 bytes
SHA-256: f68a64d095b43ecfc4a50aa11c59166f30c04ebb5188e6b7ad1b8a3c836a21fe
font_02_sfnt_off00015fd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15FD3 11044 bytes
SHA-256: 654ee7fc37206b14fd4c9cbaec66863b5ebffedc496b2f066efe4741e7dee0be

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