Malicious PDF — malware analysis report

Static analysis result for SHA-256 56efac53ad600ad3…

MALICIOUS

PDF

44.9 KB Created: 2020-10-03 20:49:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: b65a59134b24991fe8c5b3ef66af498b SHA-1: f5acaf565c9b668ad4b997989e7cf2931d33389b SHA-256: 56efac53ad600ad3cb6c143fdc62eb83378948578fcd86748d9252be65e4d3a5
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 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://ggtraff.ru/strik?keyword=mendenhall+introduccion+a+la+probabilidad+y+estadistica In PDF document text
    • http://files.westhartselle.com/uploads/1/3/0/8/130814680/zasewasazubasibu.pdfIn PDF document text
    • http://ronowon.gehringerwines.ca/uploads/1/3/1/0/131070450/bijolu.pdfIn PDF document text
    • http://files.adonaisgoldendoodles.com/uploads/1/3/2/8/132814232/milisobedejig_wufimobujajefik_nojokuzavoloxa.pdfIn PDF document text
    • http://files.lqqkerinsider.com/uploads/1/3/1/0/131070207/lasufujufetumiso.pdfIn PDF document text
    • http://gorub.sebogmbh.com/uploads/1/3/0/7/130776485/61c0b362.pdfIn PDF document text
    • http://files.wsirish.org/uploads/1/3/2/6/132681281/nelulurotu.pdfIn PDF document text
    • http://files.thegracefulbox.com/uploads/1/3/0/7/130740368/3459621.pdfIn PDF document text
    • http://berul.alexmaki.com/uploads/1/3/0/7/130739826/popizugewa_natiwukowo.pdfIn PDF document text
    • http://vaxawi.mermaidinforeignwaters.com/uploads/1/3/1/1/131164250/safaw.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/14013807309.pdfIn PDF document text
    • https://site-1038879.mozfiles.com/files/1038879/titomodovijutekapiw.pdfIn PDF document text
    • https://site-1037833.mozfiles.com/files/1037833/dokawuj.pdfIn PDF document text
    • https://site-1043042.mozfiles.com/files/1043042/jofozavoxekujelasit.pdfIn PDF document text
    • https://site-1039802.mozfiles.com/files/1039802/verinuledi.pdfIn PDF document text
    • https://site-1036651.mozfiles.com/files/1036651/ninarevi.pdfIn PDF document text
    • https://site-1040514.mozfiles.com/files/1040514/54537108401.pdfIn PDF document text
    • https://site-1043126.mozfiles.com/files/1043126/4855306318.pdfIn PDF document text
    • https://site-1036975.mozfiles.com/files/1036975/80751652902.pdfIn PDF document text
    • https://site-1039645.mozfiles.com/files/1039645/sevanapesobunizo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0A 5288 bytes
SHA-256: 6f89e6923a3abe6671364a161e03d5aadc5fac11ac80b936f44ea23e05087335
font_01_sfnt_off000070f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F5 11256 bytes
SHA-256: c3ff3ddb54157f03674ab0f0830d24c4dff5b5a84a41a8084716c64301650797
font_02_sfnt_off000095aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95AA 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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