Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f9674f8e40dfca9…

MALICIOUS

PDF

76.5 KB Created: 2021-02-11 02:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 704af9fb8c640b232fa13acdcfa60770 SHA-1: 90155a2ce9f349a1acf76eb6501b1a14d1403455 SHA-256: 7f9674f8e40dfca961324742f2645cbebd54f3636caf570dee37ab0f11111ee4
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/123?utm_term=guild+wars+1+download+all+maps PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462993/normal_5fdc20923c010.pdfIn PDF document text
    • http://umniashka.ru/evaluate_linear_functions_worksheetj1k7d.pdfIn PDF document text
    • https://jerijumewatopod.weebly.com/uploads/1/3/5/3/135330781/juposatigunare.pdfIn PDF document text
    • https://cdn.sqhk.co/jimumakevaji/hbchijj/wifi_weather_station_home_assistant.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417808/normal_5fdbfd1b6cad2.pdfIn PDF document text
    • http://bigmagazin.xyz/google_chrome_apk_free_for_windowshvxef.pdfIn PDF document text
    • https://cdn.sqhk.co/gotulurowav/hbwlgfV/nubudojomekol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477873/normal_6016c2a722633.pdfIn PDF document text
    • https://cdn.sqhk.co/posaleren/nnuiaZ5/amazon_music_prime_membership.pdfIn PDF document text
    • http://mavitrade.com/disney_boat_driver_salaryh39f7.pdfIn PDF document text
    • http://groby-ritual.online/rebel_without_a_crewehj07.pdfIn PDF document text
    • https://cdn.sqhk.co/zodozane/higc0GF/daily_planner_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457861/normal_5fe2bc40b9ada.pdfIn PDF document text
    • http://roflan.site/lurizakomisozurebozivafubimlfy.pdfIn PDF document text
    • http://invitesistem.ru/kokosutalaa9qkh.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_off0000ea14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA14 5280 bytes
SHA-256: f70b8131c67b1ae8a2162d521f45ee24d131419ec039673dbcf895e433e54ac2
font_01_sfnt_off0000fc08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC08 11628 bytes
SHA-256: 4e13a9d69bc88fac87ca9e62eb5583431c605dbad4ddee72da2e2f28ff7b868e