Malicious PDF — malware analysis report

Static analysis result for SHA-256 a444688f72ee8863…

MALICIOUS

PDF

44.9 KB Created: 2020-10-16 03:48:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d404c3d1b7b17b2c49bc4375a35a48da SHA-1: 8e7617f1167a81cc7cdc58a038aff75464b8a6ce SHA-256: a444688f72ee886308159dce6433bb41aeab551e4e18f12d8ec24a9fae530d65
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/strik?keyword=multiples+worksheets+grade+7 In PDF document text
    • https://sekojufakov.weebly.com/uploads/1/3/0/7/130776719/f9ae7d7265bc.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/nidisetati.pdfIn PDF document text
    • https://nanorobudilason.weebly.com/uploads/1/3/0/7/130775181/jabedu.pdfIn PDF document text
    • https://topodomero.weebly.com/uploads/1/3/2/6/132696018/5b259.pdfIn PDF document text
    • https://site-1036625.mozfiles.com/files/1036625/wilovibodoxeji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369191/normal_5f88cd7548f45.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365539/normal_5f8703deb4429.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/2c7bb335-1661-4d01-b3b3-f7d48a45ffe2/defosozeginifasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3cf98fa-cc70-4256-b004-8dace4d2d884/puzeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98419b2d-4196-42ce-b9d7-0dd9a8fca29e/4796836888.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a200b0c8-18f4-4ced-8be8-88b10c997883/zewixopawex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e015e55-a0ea-4543-a7ec-90a30c51b9af/8954125659.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d4e536c-4f59-4862-9f70-49b9c623573f/xukel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb35fd0a-b9a9-4a85-aaba-5b49066b0fb7/40821800546.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f0a7ebd-6376-4859-8de6-2674b2cc5a44/86610786827.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2a92906-3e63-4eae-85dd-8cf55f178c2c/99785958512.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6963/6249/files/pensamientos_cristianos_cortos_para_reflexionar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9372/1255/files/bufaxederafewik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5589/2630/files/pet_link_microchip_registration.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6277/8263/files/59535897608.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_off00006dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DFD 5460 bytes
SHA-256: fe5d4fb07661ae7469f3e4071e1f9007c842dfdcd1a7614b8255ef0f6ab63a5c
font_01_sfnt_off000080a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80A7 11716 bytes
SHA-256: c3474d4de4dfd3e2fba695401b62fe7b671268bff8808c156c9a1fa8b985c8a5

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