Malicious PDF — malware analysis report

Static analysis result for SHA-256 2829673fc74e88dd…

MALICIOUS

PDF

97.0 KB Created: 2021-07-08 04:36:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5a7ea2bd21490263e5ddd96aca7c3f55 SHA-1: 496ea30f33de0927b85925b028428306827a94f7 SHA-256: 2829673fc74e88dddfd754708794f6e880138168854a53413ee6c3d4b7baf3b3
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous links, many pointing to compromised WordPress sites and disposable hosting, characteristic of a link farm used to distribute malicious content or phish users. The document body is unreadable binary data, offering no direct clues to its purpose beyond what the heuristics provide.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 http://suankaew.net/upload/userfile/files/51537993766.pdf In PDF document text
    • http://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/lududimozanabinefataw.pdfIn PDF document text
    • https://kga-am-adlergestell-ev.de/kga/ckfinder/userfiles/files/66601874261.pdfIn PDF document text
    • http://zrdb-drogbud.pl/Upload/file/xalavafijapusokalizujefi.pdfIn PDF document text
    • http://criollo-cocoa.com/userfiles/file/dejixe.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/s5k6d6n73sm8ffll6c36nr1626/45598299051.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/uosofo5qri8iv8ts2mqnbu3he0/91378595387.pdfIn PDF document text
    • http://bijverhoeven.nl/uploads/files/wakek.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/rinamejixagul.pdfIn PDF document text
    • https://hoavily.com/uploads/files/bejitibugaxifoxu.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a21b1d5a22f---momubukazizibokip.pdfIn PDF document text
    • http://brooklynsmokeshops.com/admin/images/file/60513918712.pdfIn PDF document text
    • https://werbemittelag.chupload/file/8984344343.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c10c79b393a---nudaxugazatobo.pdfIn PDF document text
    • https://cochleartudaskozpont.hu/files/83983560040.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16074758ac358a---80745005835.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078dadd66ed9---lazonojojuvigifan.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16086271b7dabf---87351978755.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160819f90883ec---bonujadoxutesogelivixop.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/1815afee8c66a5e12d4cb1f930951054/weporaledajigopu.pdfIn PDF document text
    • http://ozanatalan.com/iboard/includes/userfiles/files/lojifabiwaxukuri.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/8189823991.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=cold+air+standard+otto+cyclePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D00 1840 bytes
SHA-256: 81f823f85949f50d23acd68ddf097497ca74cf24f719442e32a604a0801fb899
font_01_sfnt_off0001165c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1165C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E73 10508 bytes
SHA-256: 13acbc5974a1b609ccb98e4327ad217e54dda18a72c18ad747bc6e3de4e85036
font_03_sfnt_off0001467e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1467E 18108 bytes
SHA-256: fd618c7f4fd2a09e6eeeef0ba877194a0c621fd34c17539299df77b856fe83e6