Malicious PDF — malware analysis report

Static analysis result for SHA-256 21fc2312f36cce6b…

MALICIOUS

PDF

87.0 KB Created: 2021-06-30 00:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 87f95185a80da517ca25318b476caa62 SHA-1: 04c2f21debfb84e169dcc41b0cc2c3e4463bb87e SHA-256: 21fc2312f36cce6b2c3a52cb6d7c2c76ab34a17b2f2a83bdfdac03e6c9e404b3
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The file contains a link farm hosted on compromised websites, suggesting an attempt to redirect users to malicious content. The presence of numerous links on disposable or compromised hosting further supports a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/a3a9037457ed886d98f06b7d264d08c8/dizajedomofitonavirin.pdf In PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/58860097601.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608da136b6558---47082490947.pdfIn PDF document text
    • https://webtechnocrats.com/upload/file/pirereresu.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9025a1f42f---xobuzepiw.pdfIn PDF document text
    • http://sacoorhealth.pt/site/upload/file/26868380967.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/bpaiel28dr4c3d54sbumpbcprl/64327632755.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cd76d96e0---48592789403.pdfIn PDF document text
    • https://www.prestigeautobody.com.au/wp-content/plugins/super-forms/uploads/php/files/da32748e39d655a27da066fa320e8f1f/gifobo.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096dd7574b80---91700264211.pdfIn PDF document text
    • https://cabsfromheathrow.com/userfiles/file/kopirukadazizobijav.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/b05f2f876ed09b5b405f903eaea3cf3b/zexazerib.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/64069602132.pdfIn PDF document text
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608df445520b4---komimareminaxarivojomoz.pdfIn PDF document text
    • https://aterhesseg.com/up_image/file/20045406287.pdfIn PDF document text
    • http://paradisoseminatrici.it/userfiles/files/11994285761.pdfIn PDF document text
    • https://justbuymeds.net/userfiles/file/36478670046.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081b72c6dbb8---debib.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b2dea053a---26100518509.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210528/file/16222061005871.pdfIn PDF document text
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/a171b512d6c288e310dcd4bd840d389b/moguvila.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/m9tn6gmirjceuhth6bua62mv0r/jizajebafimofobupadod.pdfIn PDF document text
    • https://lsp.od.ua/wp-content/plugins/super-forms/uploads/php/files/j0slorbqk9jrrclfhb5kktntm4/41294569372.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160cc299bd35bf---mudomudejopewimofegani.pdfIn PDF document text
    • http://bio86.fr/fichiers/lixagimixesuronomores.pdfIn PDF document text
    • http://nrnchina.com/test/images/ckfinder/files/13134161825.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=repotting+store+bought+plantsPDF 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_off0000f1b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B6 17008 bytes
SHA-256: cf2fe9b2d19a411299de5f66ac99725837caab81134d994ef7a424b3c740876c
font_01_sfnt_off00011e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E10 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13627 10816 bytes
SHA-256: 17e15ec6c9910b3d4c886b494e74773d31f430263a2ae3c9a7872da5f6b7fd54