Malicious PDF — malware analysis report

Static analysis result for SHA-256 18bbb59847b457f1…

MALICIOUS

PDF

78.3 KB Created: 2021-04-16 13:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: faa663fdb4815b0aef969689868e8455 SHA-1: 576b798f1b26a569eb74b6ad6197b84136b5c53f SHA-256: 18bbb59847b457f1b94050f0e5ca3c18065051b38c7c353391a8018af6c7bfac
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content or phishing sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a lure to external malicious resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://druttle.ru/strik?utm_term=movies+like+crazy+stupid+love+on+netflix PDF link annotation
    • http://ig-mediateam.net/how_do_crits_work_in_5ep9wnc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454556/normal_605b02a7b5ef1.pdfIn PDF document text
    • http://modernstyle.pro/9477698517dqakz.pdfIn PDF document text
    • http://pokovata.scienceontheweb.net/ruxokesiruzamoxulasiju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497688/normal_5fe4223b7a7b0.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/81238975855.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465393/normal_605fb346d7e6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410727/normal_60485f15656f7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_604cfa814dfde.pdfIn PDF document text
    • http://moresukko.ru/rodotexazaviduso10gtg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_5fc8bad8be715.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385636/normal_603072c211e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416326/normal_60246f2267562.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futakanawus.onlinewebshop.net/how_to_connect_a_netgear_n300_wifi_extender.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5e79b2f-69e5-4968-9e04-312b774c4886/kodapevibedaporelekum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/724cb7c0-a883-490b-ab11-237fe7375ce2/much_ado_about_nothing_hero_and_claudio_relationship.pdfIn PDF document text
    • http://jonesojawu.myartsonline.com/49016225328.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1b92ba3-af59-45b2-a076-3ca9b13f788b/sql_in_10_minutes_a_day.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91aff213-c07c-4b30-bce4-e33c2ba7094f/will_succession_act.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3881f98-0aef-4d5f-a9c4-bfa9c3f71a2e/gevoxadaminen.pdfIn PDF document text
    • http://xotaferuju.myartsonline.com/79002433045.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82c9c12a-8fd8-479d-969f-5d9ba51aa18d/vusodirenizesawew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/219f9ae4-90b0-46c5-9e5d-c8eb53ea40be/quantum_field_theory_in_curved_spacetime_and_black_hole_thermodynamics.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_off0000f282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF282 5496 bytes
SHA-256: 6eed681c5f5939436d7a3a2ce207701a36374690f42b52c90b57269e7f4ac490
font_01_sfnt_off00010574.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10574 11176 bytes
SHA-256: 53b49670d94d025739454689771ec6e73884835533de1d9d166778eed4a1fd37

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