Malicious PDF — malware analysis report

Static analysis result for SHA-256 8293dbb2cffed706…

MALICIOUS

PDF

84.9 KB Created: 2021-07-06 17:17:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 27788a9400b3d9b0538a1bd1c29a6f6b SHA-1: cee21662bc2bc5c1407174a1383cc159a9189fb9 SHA-256: 8293dbb2cffed706bd92ac2287bff427f8a8a9d21693bee006807957eb39a177
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised websites, suggesting a phishing or malware distribution scheme. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is part of a link farm hosted on compromised or disposable infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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=ringing+in+the+right+ear+omen PDF link annotation
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606c864181e80---kogij.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c7815125e---tuvivutusanevo.pdfIn PDF document text
    • http://szao-spb.ru/images/news/file/zesuzavobaxixugazi.pdfIn PDF document text
    • http://aqcons.vn/upload/files/62556050231.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/fibaxofuw.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/smufntnioql7qbbu3qiukoike4/34723571219.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/53636555195.pdfIn PDF document text
    • http://hgbs.de/userfiles/file/butuzoxoninuta.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0fa441f5d---46544817464.pdfIn PDF document text
    • http://hyosangjo.com/userfiles/file/20210612185937.pdfIn PDF document text
    • http://momsystem.ru/public/file/46230429885.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/aee4f0b098b0c3d817e5ce40b3cf35e8/85692563218.pdfIn PDF document text
    • https://fertilizerproductionprocess.com/d/files/mafisinufewed.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/30ad78352823a8f27b347f73f00fbda0/43802172397.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/88094427247.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a961b6a657---1289633625.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/b938abb6b42057011ee0833ecab02544/72125841974.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d21eea59e3---veranoja.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1b2bd108c---jojanikiwekubogidelotu.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///bafusogeb.pdfIn PDF document text
    • https://ivanda-commerce.hr/userfiles/file/fiderivutofemuzef.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16092d77379077---guruwevasufamefivemufaxof.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/fb4d4d0c61cb1251e688744261d0bdba/35312690849.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/57361691928.pdfIn PDF document text
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/8r08a6q3hqk6j3pq4bbvbovlkl/xunasasizoxuvadabomozodav.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/cf9d171f152bb7a2cd3326f5c57023f1/90898917303.pdfIn PDF document text
    • http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/bd5i4pjk4digq930k7n9u1ml8n/77132344413.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_off0000ec51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10468 10384 bytes
SHA-256: 357ee5e6d194277f41452fc370313dd85cf7aeadaa50a7aad57c78dbb6da3b74
font_02_sfnt_off00011bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BAC 16556 bytes
SHA-256: 15e374ff689a7a0c1e33d37496b76f0a75947f98af779dc05285578c130f9cf5

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