Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d74f556b432f8a3…

MALICIOUS

PDF

66.8 KB Created: 2021-02-07 21:16:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 4ececbfe58e4633ae594c9534d3fa614 SHA-1: 9aca1ef3da66e9af6fee8d6163c53e5c3ac5ffcc SHA-256: 5d74f556b432f8a36e27963ed3aa00dda04b1a56909b22b6da585e2d4e0b13b1
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 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://yafferge.ru/aws?utm_term=ideal+gas+worksheet+pdf In PDF document text
    • http://faceit.su/ludo_king_mod_apk_unlimited_six_onlinemvzmk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449172/normal_600e338c0fe6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501027/normal_601b1e1d956bc.pdfIn PDF document text
    • https://madajeguruxe.weebly.com/uploads/1/3/4/3/134348767/rarikugofu.pdfIn PDF document text
    • http://loveantravel.xyz/6018479583owb3j.pdfIn PDF document text
    • http://rusakova.space/97649565233suzir.pdfIn PDF document text
    • http://bugesawuterodam.iblogger.org/mutowa.pdfIn PDF document text
    • http://gerakaxow.22web.org/guzibuledotirujifaxezufuk.pdfIn PDF document text
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/66aed424255d.pdfIn PDF document text
    • https://satijezusadevu.weebly.com/uploads/1/3/4/3/134310115/jegesufojuga-zapogobopudo-fajobelitop-sudijebokajoti.pdfIn PDF document text
    • http://siankaanmexico.com/isoflex_inox_italy_kniveszu6v7.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/xalexojaxipud/13278855063.pdfIn PDF document text
    • http://puwolir.epizy.com/template_p_l_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/satuja/chetham_s_school_music_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/vavejijitatofu/reacciones_acneiformes_por_medicamentos.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_off0000c7c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7C3 5396 bytes
SHA-256: 9ba91afd3f09a8f1e3e317f95a0c871268bb70f30490610a17d83539bdedc26b
font_01_sfnt_off0000da2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA2A 10268 bytes
SHA-256: 311ed3acba73b44d36e8ce3ad6663a2c71c8d47e53dc89d09a44cdb6228eb481