Malicious PDF — malware analysis report

Static analysis result for SHA-256 243845a8cd01cc9b…

MALICIOUS

PDF

74.1 KB Created: 2021-09-13 22:30:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 588a12f4efef2b2e9c5885b7f58f79b9 SHA-1: 2aad676c99a6ba18e1b38a0015de36383b0267f7 SHA-256: 243845a8cd01cc9b89d1174c23f12a105b68965eb5f829bfa78d07ecf6b74289
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to phishing sites or download further malware. The embedded JavaScript is a common technique for executing malicious code within PDF documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9827

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://drafthe.ru/uplcv?utm_term=toon+pro+apk+download PDF link annotation
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161326b158d640---5071503457.pdfIn PDF document text
    • http://slhospital.com/upload/fckeditor/file/tutowulopibevowifodok.pdfIn PDF document text
    • http://inkjetartandimage.com/Uploads/file/wolisuzajegulobujo.pdfIn PDF document text
    • http://one9five.com/userfiles/files/97433841871.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/mezesabolesuzuko.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/a298b372e3f9588a25b96386c5fd3e26/75604857373.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/ba35af961c5bfc12ae8797cdf836153b/gujamapakowikezesodarosu.pdfIn PDF document text
    • https://kicksomeglass.com/wp-content/plugins/super-forms/uploads/php/files/ca6cf6101c02619f0053e6afb4b1e92d/kukiparukokiwepewedu.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/0dbcr4q0q4v59740k33fs1c7lt/poluxadamalu.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/panalunuvunezaw.pdfIn PDF document text
    • http://www.ondebiz.com/userfiles/file/46396297920.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/7336400996.pdfIn PDF document text
    • http://esistore.de/userfiles/file/puvoxozegowefesal.pdfIn PDF document text
    • http://alpanelektrik.com/depo/sayfaresim/file/fepotijojugopabimim.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/54232874239.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/danebobatemigino.pdfIn PDF document text
    • https://martan.es/cenavarra_userfiles/files/tibubosipewazesasevosilul.pdfIn PDF document text
    • http://futurepoolandspa.com/ckfinder/userfiles/files/61371001795.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/70181547677.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16136c5d867751---61529154188.pdfIn PDF document text
    • https://granitabrasive.ro/editor_up/95008739918.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/m08isup0jsqhl0t9khl75f5hpo/wozataxakixesik.pdfIn PDF document text
    • https://abcelectricalonlineshop.brilliantwebtech.com/userfiles/files/sitixigudif.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161375c4830494---dikigeka.pdfIn PDF document text
    • https://gonguyenkhoi.vn/upload/files/26419141250.pdfIn PDF document text
    • https://tonere.shop/app/webroot/files/userfiles/files/nabezisiwogadu.pdfIn PDF document text
    • http://kleinschadenexpert.de/userfiles/file/91617475651.pdfIn PDF document text
    • 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_off0000c35d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC35D 16136 bytes
SHA-256: 254f17a15be980c1489512557aa0648e00abb64ba05e254902b6d3add78d8b73
font_01_sfnt_off0000ec5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC5C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10473 10036 bytes
SHA-256: 26b6cf7f6168493f682f0f900bf45ecbcaa3b0815b4a746a83bf34594fda9d9f

Open this report in the interactive analyzer, or submit your own file for analysis.