Malicious PDF — malware analysis report

Static analysis result for SHA-256 6db2dbcac6fdc690…

MALICIOUS

PDF

81.4 KB Created: 2021-09-01 07:17:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 8e20f4f50e589d5a0438d7a9fb7347a5 SHA-1: 04edaa455b2fefe3aaae0cd25a0681a0d9ef7c03 SHA-256: 6db2dbcac6fdc69037bc3eb9c25aa0fa529d5955559c8ede332bd353610d0e7d
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous links, many pointing to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of multiple unknown URLs further supports this phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://woft-dining.com/webroot/editor-uploads/files/55771984671.pdf In PDF document text
    • https://beautydiction.com/ckfinder/userfiles/files/derekojafaw.pdfIn PDF document text
    • https://personalloan2u.com/wp-content/plugins/super-forms/uploads/php/files/7bfd9d32f8fb8ca45e1f3960bd720eb2/xelirabewefewava.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/2aef7f1c717c9e47aaf7aba3f4d13eea/miwosokofugoxa.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609203c570cc7---vobolimesaterajunijibe.pdfIn PDF document text
    • http://littlepearlbooks.in/data/eimages/file/jonojim.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/vepuvekaj.pdfIn PDF document text
    • http://sashtraayurveda.com/ckfinder/userfiles/files/33906834038.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/41153475804.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160944c57068a2---zuvibi.pdfIn PDF document text
    • http://paletydozahrady.cz/ckfinder/userfiles/files/73680814844.pdfIn PDF document text
    • http://mariangelesorrico.com/galeria/files/41279951234.pdfIn PDF document text
    • https://myshalewell.com/userfiles/file/degefuxezasiwukupo.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/rvsvlvpavfv2gj2gg7ngc2pnv3/jorodasevex.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608b8e7cd5534---27282853183.pdfIn PDF document text
    • http://africareview.in/userfiles/file/68815533990.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/rubusovikosebot.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/30018304154.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/wenuz.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160989232d88a6---wuxukobasexaxan.pdfIn PDF document text
    • http://gdwtechnology.com/fckeditor/file/47754715219.pdfIn PDF document text
    • http://hayatteknoloji.com/webimage/file/38193679123.pdfIn PDF document text
    • http://serting.eu/userfiles/files/vajoligimagu.pdfIn PDF document text
    • http://a1climbing.com/userfiles/files/galukodaledovo.pdfIn PDF document text
    • https://rwd1.thadv.com/upload/files/29543421033.pdfIn PDF document text
    • https://wheelmartthailand.com/image/upload/File/luzibelawovikuwubo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=windows+how+to+combine+pdfsPDF 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_off0000dbbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3D5 10796 bytes
SHA-256: c9e67fe2711e49185051f0a2bc58f7c7117d0e9936b1f7b8965519b6a1147d8a
font_02_sfnt_off00010c4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4D 17012 bytes
SHA-256: ec67ce1e62b5854a40c54daa4ce80852631df21ddce55cf9d4e2dce4ebe1332f