Malicious PDF — malware analysis report

Static analysis result for SHA-256 2790153f5a814507…

MALICIOUS

PDF

79.9 KB Created: 2021-07-05 19:18:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7905aa828883a2483d100233d2b6a45a SHA-1: d70e3ae5471a884da29042a1724e0f68474d9644 SHA-256: 2790153f5a8145074897a66104222b04cac058c1ff7a5f8e1dafd1d0caada4af
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, containing numerous URLs that point to various websites, some of which are hosted on compromised WordPress installations. The primary purpose appears to be directing users to external, potentially malicious, content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cructi.ru/uplcv?utm_term=under+the+dome+full+movie+download
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606d564ca3d5d---23272425689.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ba59dad1f39---90581248355.pdf
    • https://lavaecucebrescia.it/file/tevolesotupewuribum.pdf
    • https://newtech-utm.pl/userfiles/file/rigosexi.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c716d5f6fd---17441977202.pdf
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/p6vef5csecnid6ghgej2cv73r0/zuzaz.pdf
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b54d2f4a7aa---lezuribewifuxanugifug.pdf
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/afe820f9865290e8fada70c3b52889a3/kolametedenevatojonugi.pdf
    • http://imailbox.nl/images/uploadedimages/file/paginigo.pdf
    • https://nistd.in/userfiles/file/wutozibiludekimeb.pdf
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/5915888701.pdf
    • http://pamat.ro/UserFiles/file/venef.pdf
    • https://www.tessilgiada.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075988a34aa4---53939660830.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f840f78780---62894171230.pdf
    • http://bannails.com/fckeditor_userfiles/file/sorarunedufabija.pdf
    • http://www.mostenpo.jp/userfiles/files/65310339816.pdf
    • https://eventspicer.com/ckfinder/userfiles/files/kovil.pdf
    • https://piuspvc.it/userfiles/file/nudinonuw.pdf
    • http://qzgj.cn/upload/file/306549703.pdf
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d844d43992---4370441514.pdf
    • https://grupo-kayros.com/userfiles/file/nivigaja.pdf
    • http://www.nisbd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f53c063421---vejovozunexivitaduroli.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606c931fe3413---rukuzoneb.pdf
    • 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_off0000d04f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD04F 16792 bytes
font_01_sfnt_off0000e866.bin
59047d65b139dfb88bc0e6a966c59529a7750fa9b4dab9c80df9d1e963a45a55
pdf-font-stream PDF embedded font (sfnt) at offset 0xE866 10712 bytes
font_02_sfnt_off000100ca.bin
5f4dc5eb869d5651045b523849580d9f07e7261ea3ac5138f64e55ac22129ed1
pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 18480 bytes