Malicious PDF — malware analysis report

Static analysis result for SHA-256 afbaed9c3b84a18d…

MALICIOUS

PDF

74.2 KB Created: 2021-09-04 10:31:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6cfe594c16c77b0fe5d8cd5497a406cb SHA-1: 771803a3922b9f07dd75fd086d1b05e5dc212cac SHA-256: afbaed9c3b84a18d4a44a4a6e0d44067cd4c5554e381fc62cded4f8b0fdd653f
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload directories or are part of link farms on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery through these links. The file's structure and URL patterns suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/qlrda093kg8o1nnbjqbmv0agn7/43442457184.pdf In PDF document text
    • https://pcparts.fr/ckfinder/userfiles/files/52434308131.pdfIn PDF document text
    • http://wrtour.com/FileData/ckfinder/files/20210611_8E48D3D48F9E4B7F.pdfIn PDF document text
    • https://annekienlen.fr/imagesfile/28403793070.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a9cdb8931---tefivusexibajapovi.pdfIn PDF document text
    • http://budka39.ru/files/7258408621.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/nojewod.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160fa572935351---wolinat.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/kutinanikubozo.pdfIn PDF document text
    • https://xehowo24h.com/images/ckeditor/files/62285446748.pdfIn PDF document text
    • http://cnkls.com/userfiles/file/1628749218.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/kafujidapiletururokiru.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7881d33ab2---94596254467.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b49c65dfdbb6e674789a0d0fda0053c6/pejemufivubadazozufovoba.pdfIn PDF document text
    • http://kasintorn.com/images/upload/files/jabamowasotazuzelurafima.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/tusijodubogolasoluvavati.pdfIn PDF document text
    • http://daisytalavera.com/userfiles/files/80249824180.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/qf3v03ut6r5s9rbi72nkt8miro/fezoduxutajikebuv.pdfIn PDF document text
    • http://charontrade.hu/data/file/dofubaroduwenipobawutukit.pdfIn PDF document text
    • http://tinhdaurosa.com/Images_upload/files/xamudisofe.pdfIn PDF document text
    • http://buddhavehicle.com/userfiles/file/mutaxazuvisatenijofozake.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084f2f45d83f---pufuf.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/f9du6cu7vuto6e9uh2egq0cfub/fopuxovajaditumod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=apple+wired+mighty+mouse+manualPDF 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_off0000be63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE63 11120 bytes
SHA-256: 7a072d5b8145e0ce566596a9d25768443134099ca347aa92a10bd19c515da447
font_01_sfnt_off0000d807.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD807 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF019 16684 bytes
SHA-256: 2ffcac690e15c106b5851c3e8cfa4e840b7705e9be00379818c4d41c48c5234d

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