Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8f6a9b3a0489ef…

MALICIOUS

PDF

62.2 KB Created: 2020-10-16 01:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 837b92c2b46d33f12ff72446de041628 SHA-1: efd10b22ab76f1350f5f581444e5cd1bd1e755fb SHA-256: ef8f6a9b3a0489ef87530434f7e585b48fca982f47d881dc8161ca556def9310
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/123?keyword=mandalas+para+ni%25C3%25B1os+de+primaria+pdf In PDF document text
    • https://site-1040977.mozfiles.com/files/1040977/mikaral.pdfIn PDF document text
    • https://site-1043565.mozfiles.com/files/1043565/root_s8_android_9_without_pc.pdfIn PDF document text
    • https://site-1036761.mozfiles.com/files/1036761/nowinodudedovegagirujasab.pdfIn PDF document text
    • https://site-1040506.mozfiles.com/files/1040506/33644901256.pdfIn PDF document text
    • https://site-1042926.mozfiles.com/files/1042926/mivan_construction_technology.pdfIn PDF document text
    • https://site-1041761.mozfiles.com/files/1041761/38810373070.pdfIn PDF document text
    • https://site-1039720.mozfiles.com/files/1039720/61163779211.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365657/normal_5f88c8ed48e2b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366014/normal_5f8719c4256f8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366630/normal_5f875f17d763c.pdfIn PDF document text
    • https://site-1048288.mozfiles.com/files/1048288/2191284264.pdfIn PDF document text
    • https://site-1040097.mozfiles.com/files/1040097/sijibubozemukunoravito.pdfIn PDF document text
    • https://site-1038675.mozfiles.com/files/1038675/55448366142.pdfIn PDF document text
    • https://site-1041411.mozfiles.com/files/1041411/pupizitebofitebofojipa.pdfIn PDF document text
    • https://site-1039608.mozfiles.com/files/1039608/56593321026.pdfIn PDF document text
    • https://site-1039187.mozfiles.com/files/1039187/50763887637.pdfIn PDF document text
    • https://site-1043534.mozfiles.com/files/1043534/gosuwowebonelifuximele.pdfIn PDF document text
    • https://site-1037881.mozfiles.com/files/1037881/nuxil.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/d1594944-81d0-4e75-a494-b338cadde840/61506145335.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/437a6af8-8fd3-4070-a517-91ab2ec1da55/32088675541.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9C7C 5404 bytes
SHA-256: 345ccb44d96fe0faace2099a59ab8ef584116188832350f840c31a2821352e09
font_01_sfnt_off0000ae87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE87 11344 bytes
SHA-256: fdc75f80c37500e306f12be92080628341e0547467744abede009eb6ab007ce9
font_02_sfnt_off0000d37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD37E 16164 bytes
SHA-256: f2a39d09e1320237eba104eb714f61435f129ea095e8bd4273e34035deeac47e

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