Malicious PDF — malware analysis report

Static analysis result for SHA-256 d26dd2eb06f038ce…

MALICIOUS

PDF

84.9 KB Created: 2021-06-30 08:08:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 555dd466b3e1a4a99a9017038d400084 SHA-1: acf2bad3aac1abef1d8db4c70be37f04da4c9899 SHA-256: d26dd2eb06f038ce1ff2317010bb8e8155fbd3679debe458e21e03f31bd7bd68
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm hosted on multiple compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates these links are on disposable hosting, further supporting a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b0979a0217b---62681306018.pdf
    • http://ankamet.com/userfiles/file/71067382312.pdf
    • http://pwr-tech.ru/userfiles/file/vutefusimilenodawev.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609870d350d45---weniwigov.pdf
    • http://venturahigh1967.com/clients/40640/File/89068135636.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f688a5ee86---57316705483.pdf
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/pbjoclet30t3geia112k16e4fm/rupex.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ac343f97e---xurejewazixudetapavake.pdf
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/4cd74d78aae2f4c4137e080c59b6c9d7/fotalovilewonijetus.pdf
    • http://nenkin-t.com/upload_img/ck/files/nasosuvedimupagofovazo.pdf
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/56d9b3d6b6404bfc78e002da4673bd63/41930859705.pdf
    • http://axiomestates.com/userfiles/file/21903510978.pdf
    • http://cravaluos.com/ckfinder/userfiles/files/surigifusurib.pdf
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d46c806102d---vewufujimotagenesoxuzu.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1609b180ebf837---kejonifa.pdf
    • http://alpha-cp.com/userfiles/file/lisiwujefamiteliri.pdf
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094b1a609753---nilino.pdf
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a47c7e2a4ae---11576054245.pdf
    • http://mognational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdf1808e44---91043473633.pdf
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/390b7e2364560011ec0a60d605199e50/mipuviziv.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/e942883ac022b765ba78c06e4a9a8410/25520107664.pdf
    • http://tipsclubcr.com/campannas/file/49255086391.pdf
    • https://aquafilling.com/userfiles/file/96444619989.pdf
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083efa96d29e---75244037131.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=components+of+school+health+services
    • 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_off0000e8bc.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BC 16792 bytes
font_01_sfnt_off000100d3.bin
a7722a08b13ace76402db7e971935d112fbc95226c5d5584d81aef89e5c0a377
pdf-font-stream PDF embedded font (sfnt) at offset 0x100D3 10844 bytes
font_02_sfnt_off000119af.bin
809a8caffeab2024e34f62cfcabdbc02ce356840ba1a22692877e6095a2fcbb1
pdf-font-stream PDF embedded font (sfnt) at offset 0x119AF 16968 bytes