Malicious PDF — malware analysis report

Static analysis result for SHA-256 8807f589088ceca7…

MALICIOUS

PDF

113.9 KB Created: 2021-06-28 20:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7833b1e0d8fe5fb82ecb92512220471 SHA-1: 505a3562da3be41d8dbc06434989e63e0582f11d SHA-256: 8807f589088ceca7207cf3301189a798c852548d02ab054cb5fa6075fba7689b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous external links, many pointing to compromised CMS upload directories or disposable hosting, suggest a link farm designed to redirect users to malicious sites. The file's structure and the presence of external URIs indicate it is likely used as a lure for phishing or to distribute further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9855

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://big-affaires.com/img/pics/files/88809768476.pdf
    • http://salukool.ee/upload/userfiles/file/60861752232.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085def4b2464---18010882627.pdf
    • http://akinmedikal.com/uploads/file/nofevoxonepititiro.pdf
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/fbb28d192fe23e906ae72f76faf23cbd/98478600619.pdf
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160756243c8e2a---kutekodobepada.pdf
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/16092c71536967---jamapibugipikebateb.pdf
    • https://hgb.se/filer/file/92398964813.pdf
    • http://renovator.cz/files/file/ritodigotebuwobipizez.pdf
    • https://www.eziblank.com/wp-content/plugins/super-forms/uploads/php/files/pu60p31mto2se266c3scjhu1k7/95583887869.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/jcual05k5h6ik4dj2qmk8qrj41/80145789525.pdf
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c975192a8a---30701492391.pdf
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7688501b5---35713508042.pdf
    • https://forkidsvietnam.vn/wp-content/plugins/super-forms/uploads/php/files/bqhaadb1lnj4g1ba09uiroc06l/14587074693.pdf
    • http://aldara-latinoamerica.com/userfiles/file/12352368211.pdf
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/4b2e2ee56f115a1c2f397cf510be9e33/8609675190.pdf
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1608be304eb8d1---pitasewen.pdf
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730ee9453b7---gimubomisuxezutotovinudij.pdf
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c68cf417e---mufikafadene.pdf
    • https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/ba66a024da898cdb090c312c68c3f8c5/sogerusezexonezi.pdf
    • https://digireg.gr/upload/bilubifiwiziluwewilu.pdf
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/79689593620.pdf
    • http://pelesiuvalymas.lt/i/File/jiginenopilavep.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/21b7205f00dc39e8cc86a756a2bbd213/giranojuromijatodewuda.pdf
    • http://yongqingtech.com/d/files/xujedusepitenazefagiwam.pdf
    • http://szao-spb.ru/images/news/file/vasuwugan.pdf
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/gagh2im8go6p399ts9a4m48opf/53791571619.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=how+to+sign+tall+in+asl
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015d91.bin
0350917515533b22aa17072186321dfe8f289d9b932f32f36688a7d2dd0a3e87		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D91 10128 bytes
font_01_sfnt_off0001744b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1744B 16792 bytes
font_02_sfnt_off00018c5d.bin
8fabe393062929cd6cfd2a7c144001ab5065da57272facb8214de0a9db29e0f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18C5D 17484 bytes

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