Malicious PDF — malware analysis report

Static analysis result for SHA-256 4455fbb253f84337…

MALICIOUS

PDF

95.8 KB Created: 2021-07-20 09:57:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-12
MD5: c2bfbf9623dabf0e444e20231327dd53 SHA-1: 0bce7c7b1ddd70c5589f4f8a71876bb4593bce7c SHA-256: 4455fbb253f843372064a53ebf9cd27849e668eb2a8beb2eb7b00f9a7145fcda
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many pointing to compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.nevjegykiraly.hu/userfiles/files/67411162886.pdf In PDF document text
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/b5f422aec456d40c2a426380e29a6405/lagogotodozobi.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//53538623473.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/n6nfqai1uvacj8dta18ehq3nns/fafepiwasiretifemo.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ce8c8462ef6---zopumupironiji.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607906a24d46e---gujomifofivogijibemazek.pdfIn PDF document text
    • http://hong-tour.com/FileData/ckfinder/files/20210718_ECDBC93292A692E7.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a77cad3627a---43009920946.pdfIn PDF document text
    • http://minutemen-jrotc.com/clients/84940/File/pabob.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a6870a9ae23---mipadarilanexud.pdfIn PDF document text
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fff9e74a42---xuwulosakituxipifijipow.pdfIn PDF document text
    • http://mmcaana.com/clients/29274/File/kopivi.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/i0hrd4hc8hht60648ijf3c1gr7/18547950101.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160983fe31240b---ruberenirovufolomuguziw.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/71363736730.pdfIn PDF document text
    • https://zabulgaria.org/userfiles/file/nagawufuder.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ec61aa3c3a---buzat.pdfIn PDF document text
    • https://aspaeng.com/files/image/files/11464103544.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/fevozop.pdfIn PDF document text
    • https://sevsport.info/wp-content/plugins/super-forms/uploads/php/files/2df086ca2b3d0184adc8e723f02b2736/zunolula.pdfIn PDF document text
    • http://dlzj.net/upload/files/20210612142342245201.pdfIn PDF document text
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/1fc81627c2d2afec492f168adb6416ce/redogemurojuzes.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=parenting+a+child+with+dissociative+identity+disorderPDF 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_off00011249.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11249 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012a60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A60 10916 bytes
SHA-256: ddf7a11b125531b59c016daa1ec9ce3f41eef69a7bf0d25e196cd2c4ac027684
font_02_sfnt_off00014374.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14374 17076 bytes
SHA-256: f9655a13a002d49a16804d33887812e88f872e4fac43353d698fd7b11b7303dd