Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e6a09bd5b3a630b…

MALICIOUS

PDF

82.4 KB Created: 2021-08-30 01:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 63012425897dd0de8ec2e8c5bfbae097 SHA-1: 2cea7f87713b92c2c8df484faefb1a078e61af6d SHA-256: 5e6a09bd5b3a630b62b48ec818ed3fe96035e701c29551b72d47d592078f8676
156 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or to serve further malware. The file's structure as a link farm suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9934

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://fullhousetourism.com/UploadFiles/file/20210817013607154.pdf In PDF document text
    • http://myredm.ru/uploads/file/32858931715.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/eb9atmajvotd52tbh4hrn02u79/tisiduputosesaranenosopuj.pdfIn PDF document text
    • https://www.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1817ccb07---zedojowinevagupoxegafap.pdfIn PDF document text
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/b7rgf27c8nvg3m19l3jkll78nh/neroxawazoliselatizagajij.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae07c7c955---81461408487.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/39031122691.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6a5aeb32db---16360704628.pdfIn PDF document text
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/iia0ohds8c9cnrg6fhl06iko01/wobowofupoxix.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100a037a1c9c---32294771761.pdfIn PDF document text
    • https://shrmivirtual.org/wp-content/plugins/super-forms/uploads/php/files/88b1fdd897f51423018a72e41cd2e718/xixoxusadikunigapilewo.pdfIn PDF document text
    • http://cs-web-design.de/ablage/userfiles/files/giguf.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16087eb7172601---94282145343.pdfIn PDF document text
    • http://musicpark-live.de/userfiles/file/ratibulupisujivegugubadar.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/48b3b0c2e5bff3563f61a33caf345e24/wofebagavimovubobow.pdfIn PDF document text
    • http://livelyway.com/ckfinder/userfiles/files/66787843623.pdfIn PDF document text
    • http://ateliergermain.club/sites/default/files/file/29766471493.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/ea3d262b4dc0ae52b59855e084249088/8379786905.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7cea5945b---87987797037.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b279b9d572b---tokotufabuze.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/zigolo.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c8f0edb1f0---1800632415.pdfIn PDF document text
    • https://educhina.mn/editor/files/74305696879.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086788952d2e---wivevubakidob.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/12267515974.pdfIn PDF document text
    • https://jss-moms.si/upload/File/sejeropapobefi.pdfIn PDF document text
    • http://hytechplus.com/userfiles/file/nunusoben.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=football+drills+for+two+playersPDF 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_off0000db2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB2B 10704 bytes
SHA-256: 3ae5e722b689bc91fdf97e62a5a4da387657121fc9c4d943d7eae91627de2059
font_01_sfnt_off0000f3b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B3 17916 bytes
SHA-256: f20b76836be651fc993de341f3142f6c9717db54e780b32c086ca66a98112264
font_02_sfnt_off00012163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12163 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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