Malicious PDF — malware analysis report

Static analysis result for SHA-256 af261d791b2af80b…

MALICIOUS

PDF

83.3 KB Created: 2021-08-17 21:51:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-22
MD5: 8ac3b0058ed0b8bc5eabf0003ab46a33 SHA-1: 21c6d8f930e7a591ea09c07ff8c38194128271a0 SHA-256: af261d791b2af80b53f9a9394778aa4bef28f4986141063ae88e13e86b0825d3
156 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9925

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://smidgel.ru/uplcv?utm_term=misty+mountains+piano+sheet+music+easy PDF link annotation
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606d44bf2c23e---kunijesudusotikapama.pdfIn PDF document text
    • https://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/jjojrm0p5983creogb576go38i/bifarusakinevij.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160885966b689c---63218313709.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609eebd2eaf36---sexowif.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0324ef1ae7---50306974305.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce5f89c4dc1---15326553289.pdfIn PDF document text
    • http://www.agot.pl/upload/file/56859142977.pdfIn PDF document text
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb72510c88---foravej.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/ccm12c9p8i3k2m41b676dso5u7/buxaba.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093ccb904bcb---jelesurek.pdfIn PDF document text
    • http://densayhongngoai.com/uploads/userfiles/file/wegefubuzekepekowipibad.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/d26d04ab0613b93a0ccb48e02666197a/bamoseropafogudamuzodaze.pdfIn PDF document text
    • http://onlinetradeshow.ir/uploads/files/99699357042.pdfIn PDF document text
    • https://amgaa.org/temp//files/wuzelip.pdfIn PDF document text
    • http://zeroseistudio.eu/userfiles/files/lobexolapidoko.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/790832aa9937cd0a5a30f04192b507a6/wobulurujafunabebazipejo.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1a04732d53---lomero.pdfIn PDF document text
    • https://triosms.com/userfiles/file/rezitapakujadamosibogotor.pdfIn PDF document text
    • http://dailymaytrogiang.com/userfiles/files/xujusebubu.pdfIn PDF document text
    • http://www.vegagastro.pl/upload/file/58946592544.pdfIn PDF document text
    • https://dukra.sk/editor_uploads/files/43152757126.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/vivumepirewalut.pdfIn PDF document text
    • http://progfin.pl/userfiles/file/78627963804.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/2254260674.pdfIn PDF document text
    • https://greenlakepaint.com/ckfinder/userfiles/files/5688266641.pdfIn PDF document text
    • http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/00ho8f0ht05nbn09mcvilu3dk7/guzularizomevetad.pdfIn PDF document text
    • 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_off0000e254.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE254 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 10700 bytes
SHA-256: acf0cacbca7bd2299dfbe796f358b90b707e1f22a7bbdcbd7de98990fdeb6720
font_02_sfnt_off000112e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112E0 16696 bytes
SHA-256: c3a899742c4083d69fc07f507e4bd8d75c5cbeedbc62a2441c9c0a0d01b39f03