Malicious PDF — malware analysis report

Static analysis result for SHA-256 641a56b44b8f38a2…

MALICIOUS

PDF

74.3 KB Created: 2021-03-04 06:00:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 4d62cc71259acc12efd553b0ef7db4e9 SHA-1: b2a0fb80c102d0a30cd9dfbb8fa37d3c5e6f0111 SHA-256: 641a56b44b8f38a2a4d596e44ec7641c700f598e317d4820bdd8ae2bd0b08823
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://ponafet.ru/123?utm_term=microsoft+word+file+format+specification PDF link annotation
    • https://cdn.sqhk.co/rurizibaxami/jf4cdjj/66394117294.pdfIn PDF document text
    • http://nigavereke.mygamesonline.org/jexuviseni.pdfIn PDF document text
    • http://fesotisifofil.mygamesonline.org/la_familia_de_pascual_duarte_resumen_y_personajes.pdfIn PDF document text
    • http://blablablacar.online/85894736876zn430.pdfIn PDF document text
    • https://cdn.sqhk.co/loxinesupiva/jhhhgik/puraruxiwujolivofunugod.pdfIn PDF document text
    • http://winclean-shop.space/armstrong_cable_channel_guidehrpza.pdfIn PDF document text
    • https://cdn.sqhk.co/gufezitaxato/bxEghhK/spelling_word_games_for_5th_graders.pdfIn PDF document text
    • http://natorg.fun/tubebunuloropitcmo1j.pdfIn PDF document text
    • https://cdn.sqhk.co/vixukose/Aij3ieu/equipaje_adicional_air_canada.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/how_to_simplify_rational_exponents_with_fractions.pdfIn PDF document text
    • https://cdn.sqhk.co/lukejisuvawe/hcjgfWd/42610942464.pdfIn PDF document text
    • http://serururepus.scienceontheweb.net/world_of_warcraft_chronicles_audiobook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403557/normal_6013a24834a4b.pdfIn PDF document text
    • http://car-test.pro/la_novelita_2_romeo_santosop19e.pdfIn PDF document text
    • https://cdn.sqhk.co/nunamarajop/hcKhhha/wings_and_things_menu_ripley_ny.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_off0000e50e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50E 5400 bytes
SHA-256: e5142442af90473bfeac8561ef980fcaf179c8f714c9a14fc6ea20b3706a9215
font_01_sfnt_off0000f772.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF772 10832 bytes
SHA-256: 699bf06cc1e935a4e41f5e512bd40fd2c155f022065ea44de0ade36a0a2eeb5e