Malicious PDF — malware analysis report

Static analysis result for SHA-256 7680dd0f1a202103…

MALICIOUS

PDF

94.8 KB Created: 2021-07-27 17:25:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 8b7573b1562d561af2fcc733701138c7 SHA-1: 7c79080f815fb78d49b68fc9c9e3c3958304316d SHA-256: 7680dd0f1a20210351af5152840b578c5f84dbca5be276d547fb86705bb2f0b7
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. It contains a link farm pointing to multiple compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malware or conduct phishing. The PDF's structure and embedded links indicate it is designed to redirect users to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/1997af6ab3abfd732e8e9472113d3fe6/53371608485.pdf In PDF document text
    • http://mkngsp.ru/upload/files/63514970446.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/5683706170.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8bb86a8d0---fozetegavepud.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160ba1c3a9820b---letifurenibuferebekel.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/voxomusawifesikaremaku.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607bfca797ce2---fejililikot.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f094823fc---65198567306.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ee66d66d6---4669348336.pdfIn PDF document text
    • http://contextuae.com/resimler/files/pakedesatuzo.pdfIn PDF document text
    • http://yunnanyingxiang.com/ckfinder/userfiles/files/84939216795.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/e4b0r13vu241n2ku2nsc5917qg/nufipakuzimaxedamop.pdfIn PDF document text
    • http://ville-dammarie.com/ckfinder/userfiles/files/sekixuwuvenidedivi.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606d9dd7f3357---silosudiniruvopewareb.pdfIn PDF document text
    • http://mega-stainlesssteel.com/uploads/image/files/gitedupopemonowetebow.pdfIn PDF document text
    • https://espiber.cl/images/uploadedimages/file/42441303854.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/35f9e811c3cae87a38ff6f9375549f5c/57473124137.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/susesevejo.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/sdsbla57fb40fdbbhbm6l95if0/89299866913.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/dadetivogenid.pdfIn PDF document text
    • https://nnkcreations.com/userfiles/file/13578083190.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a715d0dd690---vesalomajofazulorumeguti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=hugh+masekela+sheet+musicPDF 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_off00010f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F9F 17492 bytes
SHA-256: 738a27bf59b875b151b66e69291e446009c47a12fee7bdf6e69323fef3356790
font_01_sfnt_off00013cd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CD2 10536 bytes
SHA-256: 52ab908580190dbcd110ae1e2b27233b37bba1da9d50c25343101c53d0da02a7
font_02_sfnt_off000154cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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