Malicious PDF — malware analysis report

Static analysis result for SHA-256 e267ad939b0c7ff8…

MALICIOUS

PDF

85.9 KB Created: 2021-07-01 13:26:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 0308451794ddc9c613e001338a21fa82 SHA-1: 22b59a8fd2884b6ea8f9dcd7bd925d79a913c813 SHA-256: e267ad939b0c7ff85dd71f204c735e7f47cd9317361ded20f0bb1ff9fb671d85
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links, many hosted on compromised WordPress sites, directing users to potentially malicious content. The presence of link farms on disposable hosting and the use of UTM parameters suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://queure.ru/uplcv?utm_term=types+of+havanese+dogs PDF link annotation
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16081045d181d0---52706379313.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/573d11dded671847dcbd9981de9db701/xanaworosekutudalitad.pdfIn PDF document text
    • http://dienlanhlongan.com/upload/files/93000823385.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160708f1b33884---6556118541.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/d38994cae488a528239de08cc11191c0/suves.pdfIn PDF document text
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/16083ef402b62d---venalebozizonunanisat.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/xexofiserivir.pdfIn PDF document text
    • https://avonsteel.com/UserFiles/file/nokavatalesekof.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/2f05d088b979e0140a66d98c0ccaf4fa/lakefifisake.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acc919dc233---kupuzimikogesivolok.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bfd54a11aef---sekixak.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d19b5b2d2b---45468687744.pdfIn PDF document text
    • https://alnahamgroup.com/userfiles/file/binilorakojet.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/15313145629.pdfIn PDF document text
    • http://whalesart.com/uploadfile/file///2021062109452841.pdfIn PDF document text
    • https://begili.com/uploads/image/files/47891796890.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aab121ab606---tijexozokewawiwofurudelus.pdfIn PDF document text
    • http://massarentearchitettura.com/userfiles/files/dilazutevu.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/ltiffhikvuhcfqqddo7p4qqh06/rimiwatudevarapar.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160d4cb54b1146---rawosuvederuxudogexeto.pdfIn PDF document text
    • https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/0f936a43d2dc2078fa9d315b662c3d00/49112851611.pdfIn PDF document text
    • http://rgn2u.com/userfiles/files/32707722537.pdfIn PDF document text
    • http://gerd-pollak.de/userfiles/file/51378779116.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/ephe4tpbjmc720fhov7apvnc06/nofusibuguzejeme.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b748a472f4fbe9bcf6e287fd3d7aed67/65042704750.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_off0000ef89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF89 16524 bytes
SHA-256: 83115a39c8bcf0767e1cf37b988e3c054a33ad83c9cdedc817308bee010c4513
font_01_sfnt_off00011a7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A7D 10584 bytes
SHA-256: 149c965ba010259e3a1a057c9044c4a0443caa36ae4bb547f57ceb4b3b6ab5a8
font_02_sfnt_off00013271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13271 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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