Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef50444a4152d09f…

MALICIOUS

PDF

68.9 KB Created: 2021-02-09 07:43:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: c250da2fe393fa4ff584ba1d80e1280e SHA-1: d8f292b6447e4861be4a7e05a44083c559c35cd3 SHA-256: ef50444a4152d09f1a78bf8dad9e7e661fc7a9d09611b312d63789b64bee7e9c
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/wb?keyword=dynamic%20learning%20chemistry%20answers PDF link annotation
    • https://lugijuvumefabi.weebly.com/uploads/1/3/4/7/134761930/e4cbf4.pdfIn PDF document text
    • http://legiontry.online/169933940031xmom.pdfIn PDF document text
    • http://trikolor.site/91788693830tx899.pdfIn PDF document text
    • http://istlan.space/pressure_ulcers_treatment_guidelinesovjio.pdfIn PDF document text
    • http://docita.fun/77696353207zfmrd.pdfIn PDF document text
    • http://abwaab.su/6872257017cu3b4.pdfIn PDF document text
    • http://shop-you.xyz/seven_letter_words_starting_with_am7o05x.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421056/normal_5fd88934bb00d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416802/normal_600c480447e81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383695/normal_5fd1532db6170.pdfIn PDF document text
    • https://tilakajunobeka.weebly.com/uploads/1/3/0/7/130739719/fupogalilobov_rupola_gisovoguwiwe_keporeto.pdfIn PDF document text
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/fabafozawu-nawusatek.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/viboxikuz/67764332716.pdfIn PDF document text
    • https://s3.amazonaws.com/setikizo/45605967051.pdfIn PDF document text
    • https://s3.amazonaws.com/vikukinumet/logarithms_rules_worksheet.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_off0000d12d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12D 5408 bytes
SHA-256: 1c911aff0f66201d6cc6e4abea11274b601d7a579f172ee894e9cf7806180023
font_01_sfnt_off0000e383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE383 10396 bytes
SHA-256: dd197e4a103292c542a5eda973d0d6b8faf2c8d741f8f83d936b45678e320da4