Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd0dfc17736f9219…

MALICIOUS

PDF

89.6 KB Created: 2021-07-23 17:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: c2be42310381fbec6d416ed93bc224c0 SHA-1: fca75407af713cf89722abe7d22c627e3d48edae SHA-256: fd0dfc17736f9219899f5412f66f8525ab196ee741ef07e82af2ff2bfe20435f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links pointing to websites hosted on compromised or disposable domains, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites, potentially exploiting vulnerabilities or leading to credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://webbsoil.com/home/webb/public_html/ckfinder/userfiles/files/taxexofur.pdf In PDF document text
    • https://amd-export.com/site/upload/file/xowalidisadanutevaruv.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc1ae08cc3c---larozodivenibaxaj.pdfIn PDF document text
    • http://cn-junsheng.com/upload/file///2021622194949833.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/f519567c1975e8c2a75c45405655c0f6/41592605105.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/qtojl2mi5aohlp19o4gm1vfovo/rurudunevakinixikefa.pdfIn PDF document text
    • http://chickendaylacrescenta.com/uploads/files/fidov.pdfIn PDF document text
    • https://stopserv.ru/files/file/68616813580.pdfIn PDF document text
    • https://consultingexpert.eu/fckeditor/userfiles/file/duratazoxoboxadudekizaruv.pdfIn PDF document text
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d2e4bcc5868---40442969723.pdfIn PDF document text
    • http://aaaexpressac.com/userfiles/file/jidifeguzujagirogoti.pdfIn PDF document text
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/gezibesegimak.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5cc5ca090c---momeletudupegipawimigo.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/58254126634.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/dezenegewazujef.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dc04b5ed9c7---35135691510.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609673eee588a---rigukejapelo.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2402341cd3---18278733097.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/664426d6b4a485d31240f6ba0aa39c82/88618036892.pdfIn PDF document text
    • https://daiichigroup.net/uploads/news_file/dukexonisake.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c42d9bc8197---zubuxotemunepifat.pdfIn PDF document text
    • https://ms01bet.com/contents//files/bivuwobibavom.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/0jsa1i2hgnqrtajs9t8pabkq1l/798283331.pdfIn PDF document text
    • http://npi-management.com/ressource/site-image/files/17045753627.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/2c0750f3ae2f8e8c7ae66e6dfdf1eabe/fevedov.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=romeo+and+juliet+act+2+scene+2+soliloquy+analysisPDF 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_off0000fb27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB27 11084 bytes
SHA-256: 76131a7aa9c16f09637f2c9c1ae2d85a28273748c225fa42a5e44d7a57ffb510
font_01_sfnt_off000114cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CF 16676 bytes
SHA-256: 463a4db51e1aed7b63b6f039890078ebf78742df3ad192354ca7b1a1680c43b6
font_02_sfnt_off00013fe8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FE8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1