Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec9c4ecf5f5fa97b…

MALICIOUS

PDF

39.5 KB Created: 2020-11-08 08:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: 936a53282a1127b75cadf42bd9bf710b SHA-1: f6ba7ad676c7c0317f064e1da6a7197a50dc8b2b SHA-256: ec9c4ecf5f5fa97b3c213cefd0e08fcee5617730b94e507c9b9a424fcfdd76c7
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://trafffe.ru/123?keyword=aws+d1.1+2020+forms PDF link annotation
    • https://titamifafipife.weebly.com/uploads/1/3/4/3/134315234/b7d6012.pdfIn PDF document text
    • https://gajorimimexawi.weebly.com/uploads/1/3/4/4/134458849/mulutozidezufa.pdfIn PDF document text
    • https://noginoludaven.weebly.com/uploads/1/3/4/3/134374582/2ab48.pdfIn PDF document text
    • https://gawosiluzetur.weebly.com/uploads/1/3/4/6/134631715/vaxarixu_xinege_wiwolanejavuxul_zijiwejineniwas.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://punumovuzup.files.wordpress.com/2020/11/16950068939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54b6f7bd-92f1-491b-81ce-e077be6340a5/bewavosevad.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/36730910683.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed78af4d-f006-42e5-a08b-0d0c3e6f08c2/49930770773.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/783b38f6-f3be-456d-bafd-a73a229a8b8c/50122911807.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/liwemumisusezokovow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d78573fb-88e9-474a-a201-88dad072f63c/xigogobudalopagun.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/neet_pg_mcq_books_free_download.pdfIn PDF document text
    • https://nikuberutozi.files.wordpress.com/2020/11/gekiwiwupelimi.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_off00005a61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A61 5252 bytes
SHA-256: 2611b4384567b2c6d0f3892e30e85d9cd3cb8b3573f44ea0da4a2f909ecd275c
font_01_sfnt_off00006c4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C4E 11020 bytes
SHA-256: f99c80b081407232267ef92a65e995867d683dd56b1d31ed0892043138c612af

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