Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed203f1a36691e73…

MALICIOUS

PDF

84.7 KB Created: 2021-08-06 00:50:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: ba7d8da3ec4a563d08dfa9cc7cc93d4b SHA-1: 63ee0508ef77fbdcd396c75500ebb95f2b2be473 SHA-256: ed203f1a36691e73056a7a1c2ccb3975d72902698e1451f61aedea23b5ad6081
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a social engineering tactic by presenting a lure to install a browser extension or update, a common method for malware delivery. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs suggest it may leverage JavaScript for malicious actions, potentially leading to the download and execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://oniceh.ru/uplcv?utm_term=krunker.io+mods+url+aimbot PDF link annotation
    • http://movitecnic.com/ressource/site-image/files/sizamun.pdfIn PDF document text
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607823c075c6c---difukagiwu.pdfIn PDF document text
    • https://sportnazona.bg/f/uploads/files/faludojikipixe.pdfIn PDF document text
    • https://fullgame.hu/uploads/files/bexopojedunetupiwerizesuk.pdfIn PDF document text
    • https://orangerun.re/photo/files/6908796409.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/27379704845.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16100dec6e60eb---59507626844.pdfIn PDF document text
    • https://stonebuild.bg/f/uploads/files/34347027759.pdfIn PDF document text
    • https://www.chinacimctrailer.com/wp-content/plugins/super-forms/uploads/php/files/f900eb80b8b16973911f9cdb23bef1f5/79725477947.pdfIn PDF document text
    • http://1carl.com/userfiles/file/90658211715.pdfIn PDF document text
    • http://duepassidalcentro.it/userfiles/files/befapewofuleziresofit.pdfIn PDF document text
    • https://kenadong.com/contents//files/xokodabetone.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/liwaxajaborofibatejaja.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609b5e03349cb---javavatikiwix.pdfIn PDF document text
    • http://mgtuae.com/uploads/file/18008341161.pdfIn PDF document text
    • https://fonixkoncert.hu/upload/file/tokebokuturewegimenozo.pdfIn PDF document text
    • http://asalsold.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9dde25a12a---83308768007.pdfIn PDF document text
    • http://ceroki.com/image/files/28967757624.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/8728559723.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/44409318839.pdfIn PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/d247537cf8853aaa8119575593e378d3/gulupeseb.pdfIn PDF document text
    • http://salkim.com/userfiles/file/23218324430.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/3umel9cqb3ui6154se52p75514/rotos.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/71791e4a510d29b9600e21a925852a6c/firegepawivugubodujigu.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AE 17036 bytes
SHA-256: e6639e8b3b45d08dd81307c37f4412adef5200d0a459ceb23c3a7f47bd715afc
font_01_sfnt_off00011361.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11361 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B78 10800 bytes
SHA-256: 96ec85ce5280c45b343a4ac54eb3c56979d9913db2606bd3cff391d81efeaf01

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