Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ecf078ee1a49ce8…

MALICIOUS

PDF

95.0 KB Created: 2021-07-13 01:10:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 1da95d7c1d794096ba41588d4b81c974 SHA-1: cd6c27f3c923e4e895c9238b6120759e39b7fd36 SHA-256: 7ecf078ee1a49ce821f586461c74fd2b0173a3ae7dc784d7117d626e3ed36eea
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Several heuristics point to the PDF being a link farm, with many URLs hosted on potentially compromised or disposable domains. The embedded URLs, such as 'https://coretry.ru/uplcv?utm_term=weight+decay+machine+learning', suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=weight+decay+machine+learning PDF link annotation
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/8b23c47f66b207d7c53fb977e1d181e0/52021573891.pdfIn PDF document text
    • http://uat.ideadunes.com/projects/ideadunes-portfolio-site/wp-content/plugins/formcraft/file-upload/server/content/files/160aed18f556f9---konosobodev.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160bc3f4381398---25428964236.pdfIn PDF document text
    • http://slp70.com/clients/873855/File/35088601190.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607851d24b276---gemoxireguzokisijavumoz.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/jiruwezofu.pdfIn PDF document text
    • http://labonguyenhoang.com/img-chamthi/files/wojonek.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160bcd868a7688---gazumiluxisifugesiw.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7651ed2ddc25abd7d92861c81242e1cd/95802322023.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79b6d04e9b---64398272603.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/49npe394cnq6icf84r9728ntr5/divipotezofalukapuvor.pdfIn PDF document text
    • https://nhatngudongkinh.com/upload/ckupload/files/92502563697.pdfIn PDF document text
    • http://wittlich-luexem.de/userfiles/file/zavopoxotidasomanepirasif.pdfIn PDF document text
    • https://allcreaturesinc.com/files/files/pikubugepirujumugonepu.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/1c75accea91dcfffec7ba4c49906ff51/zebawezagumuvuxiguwowoso.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d903173ea4---pokeluxikijenita.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25869d89d---nasujefokilegamir.pdfIn PDF document text
    • http://energy-labels.com/userfiles/file/bujorinodixokelabaxuvuwuk.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f45f1f39da---13623792324.pdfIn PDF document text
    • http://ithaca1962.com/clients/41687/File/ranerus.pdfIn PDF document text
    • http://drapa-technika.cz/UserFiles/File/56347027487.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/ih70gt5628114hvjk8vnrg9pj2/pawuzakunapijija.pdfIn PDF document text
    • https://doi.org/10.1609/aaai.v34i04.5904In 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

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_off00010ec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EC0 10636 bytes
SHA-256: 0fce4f847f0bdf7dfe72db0d8ac4323c722fb09524ba061dd7c6f33e04b78d45
font_01_sfnt_off000126a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126A9 18216 bytes
SHA-256: db4dd7daf65c94cf107c3c06e5c148bb6e44bbe092102d5a1a54e5c0877ac2ac
font_02_sfnt_off000156d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156D4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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