Malicious PDF — malware analysis report

Static analysis result for SHA-256 3511be454a214098…

MALICIOUS

PDF

99.2 KB Created: 2021-06-28 12:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 2600115bf4d5b67f42a16f3e1e14a68e SHA-1: 569fcc8814979ea9913cbadf5e9ea6257a120021 SHA-256: 3511be454a214098808c64374ae3c027671d1ade16026955b42dd2bc336d928b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics indicates a deliberate effort to obscure the final destination and leverage compromised infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://sketchup360.vn/wp-content/plugins/super-forms/uploads/php/files/pc5dgretm7prbghjlkittdfd76/12513720825.pdf In PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b742f4be412---298432342.pdfIn PDF document text
    • http://kompletucetnictvi.cz/files/file/jozumukurib.pdfIn PDF document text
    • https://handientu.vn/userfiles/file/65821238070.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/fezenoxab.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/91419087711.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/qng4c0odqsei28h7em728no582/sedibabasurogerobusage.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/1607884eb75a2a---pivuwikidosakevo.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/64f062a3b18be27e9fe7347519e98f7b/zixobelitudarudefawa.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/6de38b9172b62f47c94b5710ef279f3e/muxawukexikawolez.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/160802462d9d2d---70035366895.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/c4e0ed9da2a7727cf50d42554dbd4a55/petidetugadudotuk.pdfIn PDF document text
    • https://maugli24.ru/wp-content/plugins/super-forms/uploads/php/files/7863280ab416f18933944a8e972e75a2/92993390040.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/fd834795c4927ff42ccbb0f213071933/xogorobobibijigabudat.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/malunemutavupibofoxijumo.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/hni7qq17om60mbivt19ueqjo7e/folologebum.pdfIn PDF document text
    • http://mhinflatable.com/upload/file/zunadanuzaxevelixoleba.pdfIn PDF document text
    • https://abugfreemind.com/userfiles/file/45467419372.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1816295421---zaputaxipunijobodutus.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0ef656a3854efeab7328b79451cedd61/5038270444.pdfIn PDF document text
    • https://www.revistadefiesta.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608629bdc1513---97721009841.pdfIn PDF document text
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/6gq7bj6vt7gulbc6v427emblt6/manevubu.pdfIn PDF document text
    • https://mattress-leader.com/media/rinabipe.pdfIn PDF document text
    • https://garyjetcenter.com/wp-content/plugins/super-forms/uploads/php/files/44f1977db7a19236e584468abb1be7e7/65287196846.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071469f89b66---pakixuvegikijulafoz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=self+management+exercisesPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011ffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013815.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13815 10736 bytes
SHA-256: 5e43691f47748e53c2d43fd4d2801b19b259b67688e0b47a4b9e77e341df559f
font_02_sfnt_off000150bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150BF 17704 bytes
SHA-256: 52698e85971c532e17cbabb4ea61c5848e5fac8662eaa5e1c05d0e8d56d82402

Open this report in the interactive analyzer, or submit your own file for analysis.