Malicious PDF — malware analysis report

Static analysis result for SHA-256 a75129e9c94c111c…

MALICIOUS

PDF

99.8 KB Created: 2021-07-01 15:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 1c499254c5ebad342168dfa850e794dc SHA-1: 7693dba66d58040bc88530ba678c06b257f829ec SHA-256: a75129e9c94c111cdf9c9e627bd35f1770ae6caa58be69ffaa80053e9caab389
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The presence of embedded URLs and the nature of the heuristics indicate that the document likely serves as a lure to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9784

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://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/ac6f3c45be6445a15a28c1a145ab0a91/48669767728.pdf In PDF document text
    • https://hosvagyok.hu/userfiles/file/97311572659.pdfIn PDF document text
    • http://toyotarent.kr/FileData/ckfinder/files/20210528_076F7ABB75EC8416.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/bc2b97ba16488aa74d37c40c9db6cc6e/gapewoguzoginerizu.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/memitenov.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aec41497a9---39583076525.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160929b3396483---79518767980.pdfIn PDF document text
    • https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/5a0cad9d6c9e1977c155d7fc64064f39/lasepuvubukodejedoxupowof.pdfIn PDF document text
    • http://alexforstarlight.com/clients/4/41/4125d763bdae894b2c088b8c4c0f4705/File/20443089422.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a793281bf---loxunusuxugutiroropegujas.pdfIn PDF document text
    • http://smitheaster.org/clients/861344/File/48774067104.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/mamodirulix.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608b6baa7853b---13085076111.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/9eee3bf0b8832942808aeced2a3afcfc/2239132738.pdfIn PDF document text
    • http://gelateriacool.it/userfiles/files/24195122666.pdfIn PDF document text
    • https://indobaliart.com/sitefiles/file/kuzovifogexibe.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717a83eca6b---somegadifafoto.pdfIn PDF document text
    • https://www.mysmilestudios.com/wp-content/plugins/super-forms/uploads/php/files/6007e30358bfd3de3d2a185c2d131126/xetapeso.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160788438c8a2d---46230150523.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/dbe6a4df456e8bc044ab18065de9e051/puvodawunevagaferir.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/n098oufgu39vbr5m9hqmcftsdr/kewavivevu.pdfIn PDF document text
    • http://zdravi-kromeriz.cz/files/file/fodipigatexuvag.pdfIn PDF document text
    • https://xn--80afc2apd5n.xn--j1amh/upload/files/fekupexuzufekijun.pdfIn PDF document text
    • https://zoldlepes.hu/userfiles/file/xadosejaj.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/49973533407.pdfIn PDF document text
    • https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/100c828aa5732b570d35fc0a666c1e6d/92140613106.pdfIn PDF document text
    • https://unosms.us/userfiles/file/41919752373.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=pull+your+ex+back+pdf+free+downloadPDF 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_off00011c9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9C 10888 bytes
SHA-256: 9d0f982484a007814a47235069650f994a103d88f61490ca344c6d982012768a
font_01_sfnt_off000135d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135D0 20208 bytes
SHA-256: 5c8f006e98a4a7b97c51e947e92a419238ad125e3005ac46ff378a59f692194a
font_02_sfnt_off0001698c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1698C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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