Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f45f053aa23fea…

MALICIOUS

PDF

42.4 KB Created: 2020-10-16 21:03:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 4fe98a6f67b06af5771c52ef976030e8 SHA-1: 656a2975a6f28b609cf4ad309c538307209792d3 SHA-256: 28f45f053aa23fea18b28a6524b81404ca0057a09f005265fb7c18e4f1173249
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.me/123?keyword=budgeting+lesson+plan+pdf In PDF document text
    • https://babikovinemixe.weebly.com/uploads/1/3/1/8/131856339/2556250.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/f638fda.pdfIn PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/menedo-fodizelusekom.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/xiwigaluxoga_zovozarujixafo_lirinapujeturun_piwujixa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f8724e42687c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366041/normal_5f885a9817b5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365628/normal_5f87829332de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372378/normal_5f88c937f41fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367621/normal_5f875b46d8993.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/lukuxaluk.pdfIn PDF document text
    • https://keniwuki.weebly.com/uploads/1/3/1/4/131483234/32e063a95e.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/e3470f92-9c8f-4df0-8208-9e45e833a3f1/45577377093.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b361697-a189-44ed-b567-1edd20b4c764/18211287092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d8cc34b-520b-4f5c-a9c0-5fefd320763a/26579724511.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cf1bcbe-8eff-4d0f-82b8-db3573d21744/rasagoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afdc65ee-fde3-4ced-911e-9627ff684360/sagamapalug.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992d5256-1d56-44ee-a82d-893af10eba42/bukimekujirewasoto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e744d4f-f270-4b6c-8ec7-a68203bf1b1a/kotaroveve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1895/1576/files/37112370297.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5738/8440/files/nisefikonusin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0292/7003/files/genasi_air_meaning.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_off00006734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6734 5160 bytes
SHA-256: aab2ecb00ab2f66af650d378840293a3c190a133082e897a65530fa87f189cf4
font_01_sfnt_off000078dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78DC 10432 bytes
SHA-256: baf7aacc8af7f7a449bb93c5c99a2f81c8a03240c2ae3e436a5a4934eeb54715