Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab242990e9e14fe5…

MALICIOUS

PDF

101.6 KB Created: 2021-08-19 19:30:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 78194fe1c838e29e0e417e718711c404 SHA-1: 00e1786687721dd02b8de169cad8af01cfe7f39e SHA-256: ab242990e9e14fe5832d78e1149ec025b13aa94cfaa2a622234fb680ed1c8ca5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9887

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://watfordfairtrade.org/app/webroot/img/files/911842970.pdf In PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/3cd740b06173acde8737f279ec1447ae/mejalutalikugulugidavabux.pdfIn PDF document text
    • https://coastalstudio.com/images/main/file/19311124235.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/ceuros8ao7d5u4hs7hqecksur1/pazodop.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/2473602320.pdfIn PDF document text
    • https://mmoxx.mn/userfiles/files/98257240965.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/papomalu.pdfIn PDF document text
    • https://mexico-airport-transfers.com/ckfinder/userfiles/files/fosuz.pdfIn PDF document text
    • http://generaltubi.com/container/ckfiles/files/rakepop.pdfIn PDF document text
    • http://www.ochoadentalcare.com/tacgestorcontenidos_ochoa/documentos/file/In PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/664b9eb6888b8660fc1646051213042b/58634263044.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16079f8ce9d920---zinevutamukusuvunime.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/3keojf5qjbguq34l1qf3ou9en2/19765132589.pdfIn PDF document text
    • http://moristas.com/userfiles/files/dufogalomawurixigedi.pdfIn PDF document text
    • https://novzelandiya.ru/ckfinder/userfiles/files/2043454076.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/resofukovaref.pdfIn PDF document text
    • http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/972ee7cfb6fee624ca54344295ed6ba5/jilanosa.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/mbburpkvse4uadgbtfojblnhs6/masutuzutejasajuges.pdfIn PDF document text
    • http://bebsulmare.com/userfiles/files/75546157461.pdfIn PDF document text
    • https://horacebatten.com/ckfinder/userfiles/files/77444163875.pdfIn PDF document text
    • https://beautyreviveshop.com/newerac2c/userfiles/file/76971086888.pdfIn PDF document text
    • http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608596c0d35f4---nozetulufebadunexata.pdfIn PDF document text
    • https://thinkhigh-tech.com/d/files/sigagonitavasige.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/81802852340.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/4e430594b3256fc75fb479d13f370ba5/xijumejikilajal.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/zopituwovaboxafena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=cuadernillo+de+matem%C3%A1ticas+primer+grado+secundaria+pdfPDF 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_off0001226d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1226D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013a84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13A84 11276 bytes
SHA-256: f7ff1487fd7d11d36e9f7083071c97e5e911435b06935796faaf8c8eeec26c63
font_02_sfnt_off00015457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15457 19272 bytes
SHA-256: 9f1fc1e5d78e20c0f389f09264e721120fbb4529963796bf2142c22a8bc6659e