Malicious PDF — malware analysis report

Static analysis result for SHA-256 15192b54f222e3a6…

MALICIOUS

PDF

69.6 KB Created: 2021-09-17 03:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5ab3cf495274b30821ddfb57bed776e6 SHA-1: 30223d0e2a9c26ab9abbf8e925f5fb0c295f41e7 SHA-256: 15192b54f222e3a68ec4b058576412c2ff01514f4612ea2cf872f2738dd8a929
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised CMS upload directories and disposable hosting, suggesting a phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm designed for SEO manipulation, likely to host malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://moneymaker-gold.de/files/xakurafe.pdf In PDF document text
    • http://go-pxl.com/uploads/files/sizadupimaxevusizomu.pdfIn PDF document text
    • http://ccswcd.com/userfiles/file/lapugepegaj.pdfIn PDF document text
    • http://metamorfoza-krosno.pl/userfiles/file/medukosiradesilejevulixox.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/kakopasalawonosirunu.pdfIn PDF document text
    • https://karatenarrewarren.com.au/ckfinder/userfiles/files/91901900665.pdfIn PDF document text
    • http://innotack.com/userfiles/files/2574321843.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210915200842153.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/1fdalb3qvoopasa9vab0t788ek/22577132925.pdfIn PDF document text
    • https://tomas-music.com/contents/files/pemiwu.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/sibupujaduluvevevilad.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/tirapijadasurig.pdfIn PDF document text
    • https://korankertas.com/contents/files/76028106908.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16140f0f670bfa---ligezevuwefikepub.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/de88b9bec653030b97979505d49097bd/pagowiwepavaloxajekadoge.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/fenojedesoviparesanozib.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139272e08a93---radow.pdfPDF link annotation
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613afe973f79e---xowiginixugurulud.pdfIn PDF document text
    • http://doradcyprawni.com/images/pliki/nuromofe.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137df6588536---mobevazinumujan.pdfIn PDF document text
    • http://dokumsuzgec.com/userfiles/files/89887401995.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137310fd38e8---74154197743.pdfIn PDF document text
    • https://cleaner.pl/userfiles/file/19491531361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=package+disabled+proPDF 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_off0000b3c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3C2 10720 bytes
SHA-256: a61c73e63164d6240cf61ff6cae2d1d58331cda0bb47f6e0b187b2f2f08490bd
font_01_sfnt_off0000cc10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e422.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE422 14628 bytes
SHA-256: bdd8f410ab27e86a315d3b267b55155cac3316b2b2d88d666bede3f05b5b929d

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