Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ed41b0c70c80cf1…

MALICIOUS

PDF

43.5 KB Created: 2020-10-29 20:54:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 8d54dc54b45dfb6ef5bda0288faf6142 SHA-1: 8fb34cbee4edcbbcf4b4f30bf6edc4e7419ebd26 SHA-256: 4ed41b0c70c80cf12ee80c0ffdaffec7ce99b63b0281220b10b465a44d789cde
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://cctraff.ru/aws?keyword=microcenter+monitor+return+policy In PDF document text
    • https://gowubezu.weebly.com/uploads/1/3/4/4/134497845/7466120.pdfIn PDF document text
    • https://mozesewopizudal.weebly.com/uploads/1/3/4/3/134363743/e81a2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384325/normal_5f8c501dd4d55.pdfIn PDF document text
    • https://saxibodusazo.weebly.com/uploads/1/3/0/7/130740440/jepif_galawavosag_madofogapemet_situnofigukisok.pdfIn PDF document text
    • https://koworuvixoduto.weebly.com/uploads/1/3/4/3/134352933/1193813.pdfIn PDF document text
    • https://tarirubawapub.weebly.com/uploads/1/3/1/6/131606173/a5e1ec36.pdfIn PDF document text
    • https://xukanimuwuvam.weebly.com/uploads/1/3/2/6/132696198/jovaregirewegab.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/xududev-ledavodu-jatulivarolaxe-bixebenal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gogonof/advertising_and_public_relations_research_2nd_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/008330d6-2254-4f4b-a040-f64a1540ab92/falipajiwofesarokomi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/587fdf9b-f8e2-4452-ba0a-143bd468c744/wifezojetotuwifofozujum.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abd95888-6140-4e15-99c7-32b66f7ed542/resigopafixatekasezavav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2f30f89-3879-49ba-9bbc-695540d9dce9/doua_pour_retrouver_un_objet_perdu.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/18582869030.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e66ac14c-6e26-4c76-b509-ca4dd281f6cc/parts_of_a_bamboo_flute.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_off00006d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D09 4800 bytes
SHA-256: 0cc90a7b755008144c74e4a9e195aebef9fdf6aeb38dac739a514b9b861207ed
font_01_sfnt_off00007d59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D59 10324 bytes
SHA-256: 9e9ae5109b7e30ec6c2955cefd56cdd4cdfaff7295f02adea6901977d1503707

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