Malicious PDF — malware analysis report

Static analysis result for SHA-256 bddfd3b885bcb85d…

MALICIOUS

PDF

128.3 KB Created: 2021-08-01 00:05:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 59bd14dd7c6b05fc245d64c77ae2558f SHA-1: 8b9ed7d2eb44aab4e18de29f0d78f932906069c7 SHA-256: bddfd3b885bcb85d77315eb173b2dea2496c088c1c9abc7ec52db68b62e69baf
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, identified as a link farm. These links are likely used to host malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, consistent with a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdde2fa48a5---zadavabudalegolam.pdf In PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/iobe1hls29615lmlfcn8tbk9ht/ratibabapepubajetovona.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/02p2bt0oil6as33gno5dgpdi8i/bimefomoxivugugexifulo.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/rdik04ndt5ofc1o2c51l14dbct/xidokurikaxemiroxiwisugu.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/u29cq88utn9tspge865cjdq9sf/kuwil.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160dbe8b04d94c---zowumasafuzuvefu.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608ca76e539e1---41902619079.pdfIn PDF document text
    • https://www.cr-sdc.org/wp-content/plugins/super-forms/uploads/php/files/5325d2619e4939428a1292940bdd2b85/18715834935.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9b4405f1b---65807639549.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/fu5mq3j50m3mdcvde6qqpaish6/xujupodumesefabasazus.pdfIn PDF document text
    • http://karate-talence.com/newsite/userfiles/files/govokobemidivugexi.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/62408496954.pdfIn PDF document text
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/95j4uvfij1mj7h9oaa7b7d8ofq/65019243590.pdfIn PDF document text
    • https://highrise.pl/file/86732931628.pdfIn PDF document text
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d07a6880373a723855b5d3687fd1a227/4002038666.pdfIn PDF document text
    • http://structurecreative.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae071c1030e---vajoxoziserogepebizexav.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/1aad76ebfa55f72aeedf24a1bab19cab/dazik.pdfIn PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160ab29c4ed835---vafolizelevaras.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a543d5d6f9f---52045605207.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/kpb5241q84mbkl2nb6nt3cp172/85697973089.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/0e99ce5ad741924ae9c93f7aca48e562/peditujixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=analisis+de+la+novela+felices+dias+tio+sergioPDF 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_off00019213.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19213 10696 bytes
SHA-256: 040859cc2200bc4540853995809713375bc626aa71ad557a8b000238abc374dd
font_01_sfnt_off0001aa97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA97 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001c2a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C2A9 18580 bytes
SHA-256: dae02db14a8df41820c73ad8826c543989451b589c4d1d35795440ae98925bf4

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