Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8384aec72812965…

MALICIOUS

PDF

44.9 KB Created: 2020-10-22 09:21:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 7c3c2be160695363605bf48efe7cc3a1 SHA-1: 91980fa732f290b8f2028edac2ea2db28ae7650a SHA-256: b8384aec728129653b177d619d73b8a1ab311316a6f44ee3962d301da9318119
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://ttraff.com/123?keyword=narcos+season+2+episode+guide+wiki In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366382/normal_5f89db3db53ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375509/normal_5f90a028cac36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_5f9040ab669c3.pdfIn PDF document text
    • https://wefamojugibe.weebly.com/uploads/1/3/1/1/131164519/b41393.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/vamidosi-mevakitusoxosa-zozigeg.pdfIn PDF document text
    • https://gukaguse.weebly.com/uploads/1/3/1/3/131398473/1836762.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/koguzobovipigi_teberanugan.pdfIn PDF document text
    • https://lixaworone.weebly.com/uploads/1/3/1/8/131871871/4047785.pdfIn PDF document text
    • https://kanudepu.weebly.com/uploads/1/3/2/7/132740929/powukaw_sunuf_ruziwi.pdfIn PDF document text
    • https://veraweno.weebly.com/uploads/1/3/0/7/130739577/9174653.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375889/normal_5f8b5b1b03928.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367633/normal_5f874789f1138.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7481/8726/files/mac_terminal_cheat_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0498/2630/0059/files/pupirugupafexurikomisu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/0929/2472/files/51135823565.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac59750d-063c-48db-90c9-619ffd1318f1/wuvetaragidujivisisaxo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/69f0304f-413b-419a-9164-42f954c2975f/matoj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000641d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641D 5268 bytes
SHA-256: 27fda1d7270936a1e092373e4df706fd2d55216e28fd70f3f35ad87f02a33deb
font_01_sfnt_off0000761f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x761F 9896 bytes
SHA-256: 5a739b7cae742a8a847949769bc3d9ba73068997b8af7eaffe748941002fb313
font_02_sfnt_off00009818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9818 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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