Malicious PDF — malware analysis report

Static analysis result for SHA-256 654f98a6ec921f19…

MALICIOUS

PDF

34.4 KB Created: 2020-10-03 22:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 031016243c962723e2b5533510a53322 SHA-1: e8e9b5754d1e42d8e05a698ca2c2adbbc012a1ad SHA-256: 654f98a6ec921f192229d41a60d626e4f561a6e70a769d6fce39e8ef018c27f9
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=beijos+que+matam+dublado+on-line+gam In PDF document text
    • http://zigikavek.iolascott.com/uploads/1/3/0/7/130738732/getaweripem.pdfIn PDF document text
    • http://files.epochalroot.com/uploads/1/3/1/4/131438453/4959038.pdfIn PDF document text
    • https://site-1037019.mozfiles.com/files/1037019/29740921132.pdfIn PDF document text
    • https://site-1041491.mozfiles.com/files/1041491/79541125.pdfIn PDF document text
    • https://site-1036818.mozfiles.com/files/1036818/36538875436.pdfIn PDF document text
    • https://site-1039430.mozfiles.com/files/1039430/98639326180.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/66db6f10-1996-4a14-871a-ca933d6b43e8/bimixitirazajerozewowaka.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/785b06c1-d8d0-4da2-8e24-3a09820cd3ad/riwowewegonawigavaxew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2b4dad8-f354-4129-914a-3ccf76ac6f30/gisusajodogoluvilujikef.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32ae9607-ad03-4b0f-ae66-fc022e74e822/61129986139.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de02dd2e-5814-40b8-b6d0-da80920b96df/kilizuwifaxezufisonenas.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2799/5552/files/abina_and_the_important_men_summary.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3571/6503/files/school_board_of_highlands_county_facebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9464/6689/files/antiderivative_of_csc_u.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6021/4425/files/lg_front_load_washing_machine_manual.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_off00004956.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4956 5472 bytes
SHA-256: 3779ceea4f333d0dd48996bb72493d65478235fb7c75053e98ddba4af4645a45
font_01_sfnt_off00005be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5BE1 9752 bytes
SHA-256: 6c60c2f8189572464eceae95edcd36e62c1b00416f379eb08efa12164cd67f61

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