Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc43d5ae336090a5…

MALICIOUS

PDF

75.9 KB Created: 2021-02-26 16:47:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 80c6268898c378781e85c27db31bc442 SHA-1: 5084b641a82a43b153fd0b9f4270a9444a9b45a0 SHA-256: dc43d5ae336090a5eb12546347c71e1ac393305acfdfb8cbec73f43b694b436c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=calidad+de+vida+en+espa%25C3%25B1a PDF link annotation
    • https://jefiwoso.weebly.com/uploads/1/3/5/9/135996081/6085ec1bd0b2.pdfIn PDF document text
    • https://cdn.sqhk.co/vutabopi/jedfjeq/65194487136.pdfIn PDF document text
    • http://domen3.club/laxuzesutuvudupafanikapl620z.pdfIn PDF document text
    • https://keminugugenoxag.weebly.com/uploads/1/3/4/3/134321568/fb2c6a9513195a7.pdfIn PDF document text
    • https://pajixuga.weebly.com/uploads/1/3/2/3/132303126/nebuxolosoxo-kivufatajupanes-jobaxa-gatuz.pdfIn PDF document text
    • http://sodaapp.club/vigazojagujalita0yfs.pdfIn PDF document text
    • http://pek-24.cc/best_brain_teaser_puzzles_adultsghtb1.pdfIn PDF document text
    • https://cdn.sqhk.co/zativojor/iiQjcVr/blue_bottle_coffee_nyc_jobs.pdfIn PDF document text
    • https://famotufenimuz.weebly.com/uploads/1/3/4/1/134132127/pobuvewasebajiwinotu.pdfIn PDF document text
    • http://lifegirls.site/avengers_movies_in_tamil_freesinuc.pdfIn PDF document text
    • https://wuxagukokixeg.weebly.com/uploads/1/3/5/3/135398542/2e80c7f0d.pdfIn PDF document text
    • http://shoop-fe.ru/tmnt_2007_pc_game_setup_free_download9l343.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pegebunov/indonesian_embassy_visa_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/zuponefi/django_template_if_condition.pdfIn PDF document text
    • https://s3.amazonaws.com/rikolesafuwofar/astell_kern_se100_manual.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_off0000e9ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AD 5036 bytes
SHA-256: 7bf3919a4149c67a03802964342676edd0f8447bb954e09bddf608c650918ae1
font_01_sfnt_off0000faa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA0 11948 bytes
SHA-256: fecf74a0ac4f3b08926a5855212d1f34437baa88feb926744f3a69d2018fb819