Malicious PDF — malware analysis report

Static analysis result for SHA-256 23723ad474888aca…

MALICIOUS

PDF

43.0 KB Created: 2020-10-04 12:54:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: 780a4294cfb9517ae7c65a5496472da1 SHA-1: 92f8550b2a52c33750a3405a59f1cba906e5ef34 SHA-256: 23723ad474888aca0340474d0c8b76a67185749bc804625bba40782679201b37
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/pify?keyword=jubilee+margaret+walker+study+guide In PDF document text
    • http://files.scottaforsythe.com/uploads/1/3/2/8/132815183/cf70ddb4f0450.pdfIn PDF document text
    • http://vibudokal.moebasketball.com/uploads/1/3/2/3/132302782/1195388.pdfIn PDF document text
    • https://site-1036713.mozfiles.com/files/1036713/fiwozet.pdfIn PDF document text
    • https://site-1040427.mozfiles.com/files/1040427/28371584913.pdfIn PDF document text
    • https://site-1037241.mozfiles.com/files/1037241/99018915733.pdfIn PDF document text
    • https://site-1039361.mozfiles.com/files/1039361/75229963931.pdfIn PDF document text
    • https://site-1036772.mozfiles.com/files/1036772/vupaken.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/f763d8ea-8175-4511-a5a2-31d38474162b/doravoranumurulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77ffb33d-cf59-447e-b6b0-7ab749921014/livugirowofunamezo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86a84899-4365-4824-a63f-c2fa70b0b6ef/pebituvunetekuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27c128f4-5afd-4a2b-90ac-35a0030bfc55/50880983304.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2131a583-107e-48cf-b1c5-c426a4235707/99693906849.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d014941-ab7b-4028-a809-6bc9b4168a98/jokunofunevoliresude.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67f58ea4-1214-40c9-be17-f348d3f1f895/51789586882.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857a0aa3-d73e-40f2-9a24-34369728f7b6/84531366299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/438a2dc9-e950-4b97-99dc-09dbccb2e854/likawusawesujogalona.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

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006905.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6905 5532 bytes
SHA-256: 428b3cdc7ed9a7db657fbeed80db17cf00f1827ff736c10847b7ffcfe8a20983
font_01_sfnt_off00007bd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BD2 10272 bytes
SHA-256: 632143291e1bcf3d8f962cdbe8187d29558ce306815cbc9e30094f840a72487d

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