Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ee540349756189…

MALICIOUS

PDF

44.5 KB Created: 2020-10-16 03:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4c67338a0c007110f42fe1b76efbb8b7 SHA-1: 0f439a465095fc5cb3e545c62432f7418af9847c SHA-256: 65ee540349756189eb166c2603394ec3b08b321849768054d691ce0a7c6cfeb7
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://gettraff.ru/pify?keyword=maths+algebra+worksheets+for+grade+6 In PDF document text
    • https://site-1040869.mozfiles.com/files/1040869/kafinopatu.pdfIn PDF document text
    • https://site-1040164.mozfiles.com/files/1040164/nomuzumavumivodoji.pdfIn PDF document text
    • https://site-1041282.mozfiles.com/files/1041282/34383321162.pdfIn PDF document text
    • https://site-1043134.mozfiles.com/files/1043134/nebajemuvovagog.pdfIn PDF document text
    • https://site-1038837.mozfiles.com/files/1038837/xuguxalin.pdfIn PDF document text
    • https://site-1041291.mozfiles.com/files/1041291/zizedakij.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/9668666.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/8504891.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/pigizun.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/jolon_koxuzozudanik_makilitinami.pdfIn PDF document text
    • https://wekubuzebebam.weebly.com/uploads/1/3/0/7/130739705/8689160.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/b136039d-0b85-46fd-b864-ab0f9eefe1ce/genaratas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d03ddfed-b8a2-4147-977d-f3fa4c5c0753/20094492133.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64fc2739-a5a8-4310-bbb4-dbb52bc279f8/96215651913.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/6563/8551/files/somovosavozedaje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0464/6656/4254/files/29300361938.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4872/9767/files/sailor_moon_luna_and_artemis_baby.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8098/8310/files/2827921494.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/7673/9764/files/vepomogoguxevuvo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55fba46c-faad-47c4-adee-50da831be7ed/nanavefez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0bae286-d836-44b1-aeb0-2a1509423543/gesar.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_off00006e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E02 5624 bytes
SHA-256: b11e493d1d8bb0dcd01eba666a6f1e1f62e6dd16e64467c330aa10fc35508304
font_01_sfnt_off00008133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8133 10472 bytes
SHA-256: 5166b3e0309cd4f77c4d654886b3384a9447bd425ae0b39ddc8f5a1a8dfc90dc

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