Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6bdfcb7d44a216…

MALICIOUS

PDF

68.1 KB Created: 2021-03-27 18:15:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 42cd818272b58fc941e20529de1565ef SHA-1: 06008d766fe62a08cd5d1ee5ab854f09a44ef950 SHA-256: 7f6bdfcb7d44a21685ee05210bce16202edcfd6b2eb504aed6c45d8aca09aaf4
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The primary external URI, 'https://seumenha.ru/wix?keyword=troy+bilt+tb240+owners+manual', is likely part of a phishing or SEO poisoning scheme to attract victims. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://seumenha.ru/wix?keyword=troy+bilt+tb240+owners+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4502500/normal_5ff88731bfe5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_605563cc273de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481058/normal_5fe38cc48ff05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403120/normal_5fd61bc8f00e3.pdfIn PDF document text
    • http://vatetuda.scienceontheweb.net/62146274357.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/97874807-e149-42fe-b060-e224373bc43e/92510999592.pdfIn PDF document text
    • https://8eccd3b7-fb20-4588-a5b5-4d8c58591879.filesusr.com/ugd/0e6328_a928a105d89a4a69a0cd6a0758248f0e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e80eb47-0efc-44a3-977c-c82c23138785/mavagutujigijojunowi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edd04ab8-5973-4bf6-aca6-402460bb883c/suwimowu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c0d5a60-91c6-44b1-b83f-3fcbf5f1e7e1/3_important_facts_about_the_louisiana_purchase.pdfIn PDF document text
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_a6cfca43b874461cb230ee26f8085a2b.pdf?index=trueIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_ccb63c08596c49639980aad792f06fe0.pdf?index=trueIn PDF document text
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_8af609b9a945404d8f8a26003476c45b.pdf?index=trueIn PDF document text
    • https://4b4ea461-5266-411b-8735-d5290551f550.filesusr.com/ugd/7fedcf_e631185a4e3043b6ba85998b068977d9.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e028e6e-ce46-4373-a24c-6eafd87eb0a5/bernina_sewing_machine_repairs_near_me.pdfIn PDF document text
    • https://50aad03f-9d2a-47e6-be13-abd12f321b17.filesusr.com/ugd/3fd638_852c84062f554ed587eeb3bf2d2da73d.pdf?index=trueIn PDF document text
    • http://zepizevut.atwebpages.com/cual_es_la_mejor_biblia_catolica.pdfIn PDF document text
    • https://73c25812-7308-4b32-b985-10e2a25710ca.filesusr.com/ugd/5b604d_a4d7f1abc6e1463bbf2feb6e1f255f93.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf8c5364-660b-4e08-9109-8bbfc0e34108/26317908499.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3bd5427-bbc7-420a-b478-ca7c7e33f392/87048077627.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d802352-2562-43a8-96e4-e083caa9dc36/the_seven_laws_of_spiritual_success_selwyn_hughes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b07bee5-6a04-4f8f-8640-a697f292d1e9/puwirorikanusuponuli.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ce59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE59 5476 bytes
SHA-256: 605f8f755e7cfff217e29bc8091832492cb4fe428a66c78a9e658c8efc866cab
font_01_sfnt_off0000e0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FA 9884 bytes
SHA-256: 240a81c45ead40adf8258de2c2ab18d2002c5e0eb63dbe1672bfb069ed148d08

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