Malicious PDF — malware analysis report

Static analysis result for SHA-256 55474d66a67b0d1b…

MALICIOUS

PDF

68.8 KB Created: 2021-02-22 15:18:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 3c5e5f88fe0d9cbb22a2723d6a4f427b SHA-1: 08799b344590ac9d61b0e7c98f7e0dadc8fc7942 SHA-256: 55474d66a67b0d1b10ac74eb784c6ff2e4c9f54eea98d1153e47ae8b2177485d
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/wix?keyword=soccer+games+heads+unblocked PDF link annotation
    • https://dorikorojuj.weebly.com/uploads/1/3/3/9/133987202/5391ad211cf.pdfIn PDF document text
    • https://cdn.sqhk.co/ximegawaso/YXMhjhf/clone_hero_mobile_mp3_rhythm_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417983/normal_5fcc6207eac0c.pdfIn PDF document text
    • https://cdn.sqhk.co/lexijunibul/jagjjif/mujuterol.pdfIn PDF document text
    • https://cdn.sqhk.co/jevipugirofi/hhfYhfI/wow_cataclysm_addons_4._3._4.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/WDhj7hh/tumafapukuxisifotok.pdfIn PDF document text
    • https://mavezuwunokil.weebly.com/uploads/1/3/4/6/134627141/tugeraxeluxaki.pdfIn PDF document text
    • https://vifapuxup.weebly.com/uploads/1/3/4/0/134018045/netikij.pdfIn PDF document text
    • https://mofivekirupu.weebly.com/uploads/1/3/2/7/132740685/mexawuxafubawo-saboral-vopobalonete.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461245/normal_5fd91961bcfb4.pdfIn PDF document text
    • http://quinzsy-studio.design/10969713908mlhil.pdfIn PDF document text
    • https://cdn.sqhk.co/wiparodub/8gdzgf9/70935389108.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374852/normal_60240935275fe.pdfIn PDF document text
    • https://cdn.sqhk.co/tefulobesa/hbghjje/hurricane_superhero_wind_tornado_vegas_mafia_online.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d11d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD11D 5660 bytes
SHA-256: abfe003e3f151a6b948ff7185443a888fd9380131ef935f35fa9c54110e431c8
font_01_sfnt_off0000e42f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE42F 9972 bytes
SHA-256: 94083b98c5d8c00a557db69ef9eaba85d72a1b9b304a6611c47be09bdd817070