Malicious PDF — malware analysis report

Static analysis result for SHA-256 5afddd4e41bfcd81…

MALICIOUS

PDF

91.4 KB Created: 2021-07-08 11:41:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: e762940e35f0189a665c141eaec4879a SHA-1: 874aa02e63feb49e056a9ce9a63a0293f0c4e5b8 SHA-256: 5afddd4e41bfcd813af3de152b928da6ae8b270db7dbe7abb2139a1517774c5b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a malicious link farm designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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 http://www.jindatunnel.com/up_files/file/96189781419.pdf In PDF document text
    • http://daotaoyduoc.org/wp-content/plugins/super-forms/uploads/php/files/p5nmst49436v39thefsm7qtuve/29251429485.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac2130e1e9---rikamonibozufibeditaza.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607186f94d123---wowekemabogotarisoxo.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/1hsl76affrt2md1qppumgrdkl3/69346292879.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/borirugogujupopepidopab.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/4vqv5a187ufcjgkmr7k0nhagno/ruvuxabidonoboboninafa.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/3563f4525390412def4dfb177fd95863/kufovavipikojiti.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/fivuwal.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/e399516e54f8498500311bbbcb1311c8/gutabevavekuzumijijebeta.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608c28784e35a---70942475628.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/946e7d93911abed4bdd0eea19ebd4586/zoxijatugafa.pdfIn PDF document text
    • http://centrostudiapulia.it/files/files/62983563791.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/739f07785234f414dc50804b4ad2773a/70584581455.pdfIn PDF document text
    • http://cuatudongbinhduong.net/uploads/files/jovewizeza.pdfIn PDF document text
    • http://firegallery.ru/img/upload/puvabawilutopokamepe.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160a99304b468e---16258559989.pdfIn PDF document text
    • http://autoscuolecasetta.it/userfiles/files/nemuzojumupuwujo.pdfIn PDF document text
    • http://kxzyjy.com/CKEdit/upload/files/kefixugusuvelopazawixexa.pdfIn PDF document text
    • http://samilove-payitforward.com/clients/f/f9/f9b0b202ed5d2cb263a89f8a9bd08a94/File/9798264819.pdfIn PDF document text
    • http://palami.by/images/file/30333216525.pdfIn PDF document text
    • https://bbpartner.cz/userfiles/file/44010836712.pdfIn PDF document text
    • https://nepalimodelagency.com/userfiles/file/89343368155.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf03d8ca4c---14492531399.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a2f6754174---82357833498.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=you+think+your+cooler+than+mePDF 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_off000101a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BB 17684 bytes
SHA-256: 985c060f7eb1cac19d9a80cb5f2d4162488e848a987e7f18db222da18468309e
font_02_sfnt_off00014830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14830 10616 bytes
SHA-256: 7e5880bbb37d877ea906e42fa62e150b49691e9e0037148df46c24ee73a1231a

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