Malicious PDF — malware analysis report

Static analysis result for SHA-256 9559bddb88971c24…

MALICIOUS

PDF

54.8 KB Created: 2020-11-08 06:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: a5c9e13301584f6d6a4b42dbb62f9fc0 SHA-1: 9a7aeb378f61c2b647ff3130578ee6180a9212f1 SHA-256: 9559bddb88971c247ae8933edd03d24c824fae5b0e73db2f53a3f8bc754bd5a3
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://trafficel.ru/aws?keyword=cracked+full+mod+apk PDF link annotation
    • https://wozuwonasanava.weebly.com/uploads/1/3/1/4/131483955/nimovafoladux.pdfIn PDF document text
    • https://redunexodozik.weebly.com/uploads/1/3/0/8/130814050/5c414.pdfIn PDF document text
    • https://satotujum.weebly.com/uploads/1/3/4/3/134308249/5749743.pdfIn PDF document text
    • https://punulivolajes.weebly.com/uploads/1/3/4/6/134603903/bufuze.pdfIn PDF document text
    • https://putigazabikikim.weebly.com/uploads/1/3/2/6/132682718/simifaxiwifugam.pdfIn PDF document text
    • https://fogoravirekan.weebly.com/uploads/1/3/4/3/134335139/b37e6.pdfIn PDF document text
    • https://vozutububedem.weebly.com/uploads/1/3/4/3/134372478/palumifodopusuwa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://gafasejek.files.wordpress.com/2020/11/19040874152.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7860b781-cf6d-4bd1-ac5b-f256629ce900/48478656174.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73b269c5-3760-4b26-80de-c4baadf7a99b/56746954399.pdfIn PDF document text
    • https://s3.amazonaws.com/guwutivupudutu/my_daily_bread_confraternity_of_the_precious_blood.pdfIn PDF document text
    • https://regafuxexa.files.wordpress.com/2020/11/lara_flores_elas_primer_curso_de_contabilidad.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/lukude.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80C7 5092 bytes
SHA-256: 4ba4d5c3f5bdf99657987b1d2e92ef2e174b8ecdbec3f703407b8f71d43ed18b
font_01_sfnt_off00009207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9207 11232 bytes
SHA-256: e736f727238900792868b264f0656c354f9248d78fddf7b4db8ab985c7c05348
font_02_sfnt_off0000b873.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB873 16312 bytes
SHA-256: 531e37f64a2e7dc3bfb257675d9e6c644c7b1597f33ba9a969cd005a7ed65660

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