Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3ba0481ac8acfd…

MALICIOUS

PDF

83.4 KB Created: 2021-07-10 02:50:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 0475e0ac5410dde96036f457bf5d5eed SHA-1: 3921bae3920449e1e5e2d5bc6e0c33a03fb91803 SHA-256: 6b3ba0481ac8acfddcab8dc188f287e452354b9a6b7d23d5645f88f7771f2dd1
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites and other disposable hosting, indicating a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://ketchas.ru/uplcv?utm_term=top+vr+games PDF link annotation
    • http://al-bandak.com/userfiles/file/palelidikowebo.pdfIn PDF document text
    • https://daiichitravel.com/uploads/news_file/73858474922.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607039d84cf88---xupimovoraxexufipek.pdfIn PDF document text
    • https://dollarplus98.com/images/upload/files/24693586529.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c655ab80d59---batelifuvozagoja.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/5ff7241300a2151c443067999a232bef/vibak.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/74772334208.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/8c5f38532076bceb69ffa3a1e92a07c2/40831873225.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/83afca525ff01ad86f05ebb114f62746/tidugimovovujobu.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fdee10826b---bajunuf.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070364bd8eeb---nemiwomupogebutira.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/3642311597efd8ccde61fcf5f8650769/51264237266.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/30044428905.pdfIn PDF document text
    • http://ebd.su/UFD/7623/files/78170445843.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c2b3b4623---zulavasojobejifok.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ef525fd40---faxadesavozojenigexi.pdfIn PDF document text
    • https://samavetpharm.com/userfiles/files/kaxumawojumojabijaw.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/37195751117.pdfIn PDF document text
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071cefdceefc---47960430351.pdfIn PDF document text
    • https://urbanlivin.lu/userfiles/files/xarukadabovufuwe.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160720c717dea8---63247517486.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/6p38qdq03dfhrsp6vrnk7gn77v/suzej.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/56916902764.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/60995668026.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_off0000e6cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CD 10284 bytes
SHA-256: 813d6ff172f37c91509830ceacb94975f7da613ef693fde475d52c99f192f7f8
font_01_sfnt_off0000fe08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE08 16476 bytes
SHA-256: 16af23ac5a9380a973690e2771717fcec3e16ac8c6cd25021aec7eafbe66f65c
font_02_sfnt_off000128ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128BA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1