Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4fea4eee5fdf0e3…

MALICIOUS

PDF

111.3 KB Created: 2021-08-13 17:14:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-07-01
MD5: 2ebbb92ee468014e86ad3bf3f1b3f694 SHA-1: 54968c280006c0c2a8e94a600098941a0ef19e71 SHA-256: a4fea4eee5fdf0e3184c60d81ca0893c657f29478a1e94ee93d6c34955b2d5fb
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/uvmrs5kl9uc96a1tpb2mke90nf/29791343053.pdf In PDF document text
    • https://mamo-tato.ro/userfiles/file/93729674792.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/emr78h32rps0orisvdvjsfm157/lanutafa.pdfIn PDF document text
    • http://airsoft1.ro/files/file/bifabapowefibu.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5784e6191---98945517944.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084447527dba---buvilalafaxavazidemanamib.pdfIn PDF document text
    • http://roocenter.ru/upload/file/mozudenititupuwiloje.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/64345340198.pdfIn PDF document text
    • https://kis-u.com/page_data/file/20210607065449.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/dfb4ff75er1ed67vgh4mvcjik0/balikijejaforikavomil.pdfIn PDF document text
    • http://viswinkelindex.nl/images/uploads/59161261395.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/18898604203.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c48e7aef947---xonaruma.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089c29b24b92---gurab.pdfIn PDF document text
    • http://phuongninhphat.com/uploads/userfiles/file/julero.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/50837499098.pdfIn PDF document text
    • http://kraski-chernila.ru/resources/file/pulazomubezizo.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609368ce15a02---sinugabitigurawexamesu.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/genenepixa.pdfIn PDF document text
    • http://jun-travel.com/userfiles/file/figakuvusesoz.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a15811b41---88515298875.pdfIn PDF document text
    • https://beruanglucu.com/contents//files/reditilosazurodufaziwamel.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=what+is+the+main+purpose+of+an+argumentative+essay+brainlyPDF 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 extracted file (font_00_sfnt_off00014f85.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00014f85.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001679c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1679C 11216 bytes
SHA-256: 12df07af11d2c7b9ef755925bbb252db81e10da4ce44cc737e72aa51535a66d3
font_02_sfnt_off0001817d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1817D 16984 bytes
SHA-256: f7d6ed23e30d2ce3181dd22f16b7577eca604fbe878321954b348a6aea1a9366