Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ec74dd00e88eda7…

MALICIOUS

PDF

79.5 KB Created: 2021-06-08 19:13:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 7518ca96a8d002497fe762f2db0fced5 SHA-1: da8eacb94380e711164ca8b81e035a6c38fd0fe0 SHA-256: 8ec74dd00e88eda735900f33d4dfbfa6f473e31c12f6deb79402ee0892986d1b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing lure, using a link farm strategy to direct users to potentially malicious content, as indicated by multiple heuristics and a high ML classifier score. The embedded URLs and the document's structure suggest an attempt to exploit user interest in popular games to drive traffic to compromised websites, likely for further malware delivery or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://nomylo.ru/uplcv?utm_term=among+us+for+free+to+play+online PDF link annotation
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/8c2f17297b3dd72427fb0e44ca7edab2/31078463529.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/pupurixore.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/18862642689.pdfIn PDF document text
    • https://1sis.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6983b29fa5---51002931964.pdfIn PDF document text
    • https://medicinasolidale.org/wp-content/plugins/super-forms/uploads/php/files/586d33a70555542c1461125120780b34/raziranomegodadakekeb.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/a29815793e5e851495228763fbca3215/pekubagusasidezubevive.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160bec8007c8bf---banukagozoziwolilabezuvux.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5c283660c---gilonunareburazupa.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16071c102ed7fa---ruriziva.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/622fc024aed395dbf4dcdb2a6f11f190/jumegaponejegivugalemeg.pdfIn PDF document text
    • http://vo23.ru/upload/file/kabibafogidezokawonilan.pdfIn PDF document text
    • https://arte-salon.ru/upload_picture/78079380738.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/0f627528054c77b783421b4ab1b250c3/13295107942.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/56301514975.pdfIn PDF document text
    • http://cleannshieldflorida.com/wp-content/plugins/super-forms/uploads/php/files/634dc58cef5b7f05abf29f60ad5ff49d/tupowegizetitonujupufa.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/72716138.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA06 5312 bytes
SHA-256: 40e54a0d6cf306ee66f9faa5442d1385339461c35e10f2634520a4127e41562a
font_01_sfnt_off00010c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0E 10936 bytes
SHA-256: 357cbf57d3872c1ffa3faa5e401132750d8da900f0170075061d6e8e95df3ad7