Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd51fd0d1e9439d5…

MALICIOUS

PDF

84.0 KB Created: 2021-06-27 23:19:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 60b00f1a24f228b002683b42e86b4fa9 SHA-1: 2225f361653ac4163c2b21bb84b97ac2f3395171 SHA-256: dd51fd0d1e9439d58ad17d9ee5ca72c0e4d6d99d0d4aa20d5c2b09f5160afe9a
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to distribute further malicious content. The document body was unreadable, but the overall structure and URL analysis strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/2ca915dedfa9eb5dd370ffda62d2627a/mizat.pdf In PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dccc39cb29---87671166720.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/cfdfc966873f59bf39b34da67aa93871/liratagisurof.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071943833603---83165399036.pdfIn PDF document text
    • http://donahoelawfirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78865989098.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/3donon8snm7v982t0p92hkm06b/54371700056.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/df3c64266bddbdf91b584d8858f6d3c5/folanadutebigipefapifibi.pdfIn PDF document text
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/7ffa96e746b144f2fd5289d1abdec5e1/jamiwugo.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/04dbf818f81c0e33cbff33e561a6b609/wupajuvojoduwuzedo.pdfIn PDF document text
    • http://www.farparts.cl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd6bef2cbcd---73473181565.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/64883323196.pdfIn PDF document text
    • https://brod-plovdiv.com/images/97428686089.pdfIn PDF document text
    • https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/cccd158520a3c269d1fedce3332b2c28/30776231310.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b9ab835c61a---nolefipekapifaxezuxi.pdfIn PDF document text
    • https://melz-feu.ru/upload/giposenotag.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/f7260ecf31bf81860a0d5f457cbe5daf/98830504673.pdfIn PDF document text
    • http://praguetransfer.com/files/file/64027663378.pdfIn PDF document text
    • http://fullx.net/files/texuredudewevitavokejufep.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079419399446---26285074164.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/56888412522.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/dixojizarotaveraz.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/7eb22f665ee39d8d3f59954bc8c9ac10/tujekujezuzit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=download+networking+books+in+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_off0000e49c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49C 10992 bytes
SHA-256: 82bf8f563e1f9d04538b751452b35c6a7c6f8e1eef5838e73ef66dda31847892
font_01_sfnt_off0000fddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDDB 17348 bytes
SHA-256: 8e54e3a5ec9a8415ae282c53c7593a676cdd7c3fd0d6306f5ba0c7d78c478cf6
font_02_sfnt_off00012abb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12ABB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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