Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1ce5d8c10e97cb7…

MALICIOUS

PDF

85.0 KB Created: 2021-08-02 16:24:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 20327618989506770a504ac268d9aeb7 SHA-1: 50f69277cde58b3b58f8ff7ea2621e3fa8b1d970 SHA-256: e1ce5d8c10e97cb77cdeb3045feac5fa901e4dd45e716f0268c9b3993dded288
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to lead users to malicious content. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports its malicious nature. The primary function appears to be redirecting users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/636e34c905f0aa181d2f0c27177cf62a/dezogepowegejuwexafamow.pdf In PDF document text
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/4cs0eg8lan2he9uf8hvia6ai7i/57734598874.pdfIn PDF document text
    • http://broorybulldogs.com/clients/33993/File/fugesenofisubotubutosok.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/680b9c0eb428f1d65e2c184e15ffd07c/89085385082.pdfIn PDF document text
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/6642a44d71608a38843d24f01eb14e7e/rasaxoropudifow.pdfIn PDF document text
    • http://mauchlineware.com/html/chapelstreet/web/userfiles/files/84591243937.pdfIn PDF document text
    • http://www.191seo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160898626366e3---zawupevorikufigigoveg.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/bfaf165bd1bf426a52e90d5cd66fbf5f/kegodaxuwevuwebu.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/7c54df1ed22f7c2860f531d5fa685965/xabuwozawogewabezeki.pdfIn PDF document text
    • https://vydavatelstvoklett.sk/userfiles/file/27687575037.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/368e675ec2b241d93b03aed52d0551e2/naxapugiguwipokumenuleza.pdfIn PDF document text
    • https://deedpoll.sg/wp-content/plugins/super-forms/uploads/php/files/b04e0d9d6846bc2df40c5583e030a251/dabiguxatopaboluwef.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b48a97e2bae---26819387352.pdfIn PDF document text
    • http://centromedicoveterinarioadda.com/userfiles/files/1336580858.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/0b12a077e0dfbde0e55663add3ff0186/dofudi.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b122c9018a5.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/ar8n3etu79pftu06trlpkirmjh/sopotiwavemakijod.pdfIn PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16093c9b066c14---27544634159.pdfIn PDF document text
    • http://foodsaver.nl/app/webroot/files/userfiles/files/7519869600.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/zakoforigusewu.pdfIn PDF document text
    • http://xn----7sbab1bcaqplb0ccyi9d.xn--p1ai/files/file/tevebisodomexikokesuger.pdfIn PDF document text
    • http://stevis.cz/files/file/74543384974.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160720edd27a5b---18344181380.pdfIn PDF document text
    • https://www.llgnjinc.com/wp-content/plugins/super-forms/uploads/php/files/94f18e43e68d5b8eb76f686a6cde7571/12493055873.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/b39bea1447a3046d247d04d7836f3c7a/59116985811.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+program+comcast+remote+to+audio+receiverPDF 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_off0000e87f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE87F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10096 10952 bytes
SHA-256: 19e751412693682a07bef9928711ca8b9fc14b7b9314ad159f872443008409de
font_02_sfnt_off000119e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119E0 16680 bytes
SHA-256: 3b4d4e2886ba87fca4bc881e7bcd7e7003cf4fe357cc35a839465ceb305d61b0