Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bca3ef32bb2bf6b…

MALICIOUS

PDF

84.9 KB Created: 2021-07-14 00:10:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 28529b127a0b7c105f00cd885a8e230d SHA-1: a9399da82bc415170b0d7bb36fd3490dd4dfdbf4 SHA-256: 2bca3ef32bb2bf6b3d92f5c070c479f9e76fade8519b3553383ef445cc0a4e48
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites. Heuristics indicate this is a link farm designed to redirect users, likely as part of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/9196c98fcd3829acb42918b764d7ce66/sezazijevuminupinalivi.pdf In PDF document text
    • http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/vun396j1umk2ifvu2e7gjqk7k7/kunuwabekosubudofavuz.pdfIn PDF document text
    • http://pobierzplik.pl/uploads/files/sadizubuxopuva.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c27fd688973---10025312292.pdfIn PDF document text
    • http://say-international.eu/userfiles/file/88758994939.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/7bb05c33941c8df9e9f15bbc2f0da02b/patukuguw.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/52020512979.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/wugeraridegoto.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-5-13/20210513052353148297.pdfIn PDF document text
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/5799f182a5e0936bf197f360cbeda817/lepeteke.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/pm754mnrtp4kl2gmcri5ccee40/daxatoduvutegorum.pdfIn PDF document text
    • http://surtek.biz/image/files/20150121_074802.pdfIn PDF document text
    • http://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/2175ccadac7fc3a199dbb09533c03dd5/62596325481.pdfIn PDF document text
    • http://cobbpaynefamilyreunion.com/clients/862770/File/36184296576.pdfIn PDF document text
    • https://www.lightingdynamics.com/wp-content/plugins/super-forms/uploads/php/files/2a031a862e0c8e4337d6c7d7de4e1e94/14694305904.pdfIn PDF document text
    • http://shreejians.com/userfiles/file/80244444710.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160edfed5db0be---nojawitaxe.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/dee3dc6cf6f1cc0695696412550e051b/67279643416.pdfIn PDF document text
    • http://jaatkinson.com/userimages/fefamuvebukoduvabitejus.pdfIn PDF document text
    • https://gilbertems.com/videos/file/nikofikakenewesilavijotal.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608681ef3507b---titefuzibafap.pdfIn PDF document text
    • http://cokhibaosang.com/media/ftp/file/pefejogulosetixiw.pdfIn PDF document text
    • https://menuiserie-sainte-anne.fr/userfiles/file/87146480516.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=after+book+downloadPDF 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_off0000e91d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91D 17400 bytes
SHA-256: 4eebf9c5000bcb8d59bc625d5f560793bd953ded3299264b3e961df669a48fb0
font_01_sfnt_off000116ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116CE 10384 bytes
SHA-256: 36ae6f7e71b0d19ec3d1e5126497b49bb7e358a6c07b3294444db5fc5c17802a
font_02_sfnt_off00012e85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1