Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e470baf1d88bdf4…

MALICIOUS

PDF

85.6 KB Created: 2021-09-05 09:45:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 176dc6d1c244e0c904e5ffe79a090043 SHA-1: 6287f83188108c14fd6218d3f847b26bdfcd5b8b SHA-256: 8e470baf1d88bdf4cb241b0d670837c4c624b8b88f842a35df83439c8d8cc0cd
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised WordPress sites and other domains. The primary purpose appears to be directing users to external resources, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

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://huntic.ru/uplcv?utm_term=annihilation+livre+pdf PDF link annotation
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/aa9e15ea9c86117bad34886e72b7952c/59821259522.pdfIn PDF document text
    • https://www.allterra.group/wp-content/plugins/super-forms/uploads/php/files/3081aff7100cecce607197b405e61bb4/fezebupufixedir.pdfIn PDF document text
    • http://feynburg-uhren.de/uploads/82891845219.pdfIn PDF document text
    • http://rajhansnursery.com/userfiles/file/bilaresis.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/bm3helahjljmmdaasl8rfks9o4/kukukepabixefeb.pdfIn PDF document text
    • http://greenmodels.ru/uploads/files/8744866347.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/a502293ec7dc64232447c431113af878/deteriratuv.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16074624f09a59---73179503769.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/32144209599.pdfIn PDF document text
    • https://paroles-vives.com/ckfinder/userfiles/files/kovusorovejaweb.pdfIn PDF document text
    • http://zuche0551.com/upload/file/47167408663.pdfIn PDF document text
    • http://ingmarcofaedi.com/userfiles/files/30260096077.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/nepolikuwomifexanizup.pdfIn PDF document text
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/tilivumowisusorufapubajut.pdfIn PDF document text
    • http://fanta-life.com/userfiles/file/laleritumiguxaboxulo.pdfIn PDF document text
    • https://morganmethod.com/ci/userfiles/files/46759321236.pdfIn PDF document text
    • https://www.hmgfinance.com/ckfinder/userfiles/files/dumovotenufozisovize.pdfIn PDF document text
    • http://veterani-pushkino.ru/userfiles/files/30107475403.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/c60a13e61a811ff9d2f3f0847538809f/39948800717.pdfIn PDF document text
    • http://hidra.it/ckfinder/userfiles/files/wifudufutumeta.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/998a47f99cb43ab338fd53f70a88d244/26995240879.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/615c2a179883e2e68fa17f99a1fe863d/99815197450.pdfIn PDF document text
    • https://hkbca.org/UploadFiles/file/20210822080015170.pdfIn PDF document text
    • https://fa-vietnam.com/webroot/img/files/93019479345.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a6fd13b2e---53580204852.pdfIn PDF document text
    • https://shriramsteels.in/public/ckfinder/userfiles/files/83086835464.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_off0000e8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8CC 17808 bytes
SHA-256: 436e2649f91274a5c002e6b3e036ff1eceec2e6023997e6f6b89f4864dd0a05a
font_01_sfnt_off0001176a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1176A 10476 bytes
SHA-256: be3d49ac0e148a9e481a3fcbaf2d8edb075463a21deee2fddb7881b32d26e301
font_02_sfnt_off00012f21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F21 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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