Malicious PDF — malware analysis report

Static analysis result for SHA-256 0578d9ddee368d28…

MALICIOUS

PDF

152.6 KB Created: 2021-06-30 17:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 91a303531c74328afbb45eea62e5e7c0 SHA-1: 544409237c3a9412e982fa2faad1c7dde970690e SHA-256: 0578d9ddee368d28390197110710885421a6effda33541566a4b5abc6badad1d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated high maliciousness. It contains numerous embedded URLs, many pointing to compromised CMS upload directories, suggesting it's designed to redirect users to malicious sites. The presence of multiple external URIs and link farm heuristics indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://dobre-akce.cz/media/files/file/75913461435.pdf In PDF document text
    • http://altinay-law.com/images/file/47987927769.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/n660aojk4ov05e9t4n8kp1uu66/bivoboramor.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/fonibotota.pdfIn PDF document text
    • https://autotrans911.com/thread/admin/uploads/file/woririmejuwobojojubur.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160acc6c73c463---33675357014.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b75f8ed765b---68787839592.pdfIn PDF document text
    • https://www.myjamaicais.com/wp-content/plugins/super-forms/uploads/php/files/0e890912283e760e84f12d04b594b910/34553554506.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/34437478628.pdfIn PDF document text
    • http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/15bbfe714b35199ff28d7c7ade1e686e/xafelapegamepenufexuruza.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160d98fa07ff8e---tuzawulegoguban.pdfIn PDF document text
    • https://senhewood.com/d/files/butiduvajisezikem.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/56b078cfad69e8ba97f3bf6b8cb580a5/notifumaruxuwipopagora.pdfIn PDF document text
    • http://aiswaryamatrimonials.com/fck_uploads/file/13468153584.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071909c009b4---29170421007.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74a3444268---89172066413.pdfIn PDF document text
    • https://bodegoncriollo.com/userfiles/file/62961180306.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d56ea898052---zefaverugidukupe.pdfIn PDF document text
    • https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/a30f8bd994975b3f792c2266f5177371/21773346200.pdfIn PDF document text
    • https://apoiotelecom.com/imagens/img_fckeditor/file/valagosesapinilopowa.pdfIn PDF document text
    • https://www.growxponential.com/wp-content/plugins/super-forms/uploads/php/files/a5q2l10k131jj72cmk5mc9gk6d/vefetibaraliferorof.pdfIn PDF document text
    • https://www.penyembuhanholistikreiki.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa2109cc04a---59988071550.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c86a702298c---10082209614.pdfIn PDF document text
    • https://www.rowtheerne.com/wp-content/plugins/super-forms/uploads/php/files/16caf137054a57356840cfc7c8f17ca3/soxojawewebadupoxikumop.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=cub+scout+crossover+ceremony+scriptPDF 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_off0001f621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F621 10776 bytes
SHA-256: 2f08b9d19d4adee93791670b524544094040162265d20242d4313bfd175e5ff9
font_01_sfnt_off00020ed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20ED3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000226e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x226E5 17452 bytes
SHA-256: 46530bff382c01f76dee09d9b401cf2bb1d12d1b12c67e17ddc5fb7d7fe64121