Malicious PDF — malware analysis report

Static analysis result for SHA-256 f66f1a32e25cf470…

MALICIOUS

PDF

63.7 KB Created: 2021-02-21 16:38:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 623d66bed32f702da9c6347c9a7b2f3b SHA-1: b0229092c384cc0f8b6b7abf96fec5093280282f SHA-256: f66f1a32e25cf470dfd5ebf96c30d0d7de98246ceb2074b56fed9f8a82493937
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://bologen.ru/wix?keyword=algebra+1+module+4+test+answers PDF link annotation
    • http://tgesheff.xyz/63667970360yfq24.pdfIn PDF document text
    • https://cdn.sqhk.co/fularulojoze/hdibGzE/sad_glass_making_it_happy.pdfIn PDF document text
    • http://ital-tess.space/oxford_handbook_of_neurosurgeryjwhy5.pdfIn PDF document text
    • https://cdn.sqhk.co/vukupamita/Hige7gd/defender_zoom_usb.pdfIn PDF document text
    • http://vashastrahovka24.ru/woxavisagawezivowukiwrt8gw.pdfIn PDF document text
    • http://support-copyrighthelpservice-about.com/66126950052rl7kg.pdfIn PDF document text
    • http://hamlikjorettoop.ru/71578496887t8viw.pdfIn PDF document text
    • https://cdn.sqhk.co/terasovo/N7ghBGO/moto_racing_games_play_free_online.pdfIn PDF document text
    • https://texotawumixiwaw.weebly.com/uploads/1/3/4/8/134898612/4126435.pdfIn PDF document text
    • https://cdn.sqhk.co/fipimomozuk/ijDbEig/76178075004.pdfIn PDF document text
    • https://cdn.sqhk.co/dopiporajen/hJOjdhb/sonic_dash_2_mod_apk_happymod.pdfIn PDF document text
    • http://mishabelle.ru/93205606743rwmi9.pdfIn PDF document text
    • https://rakositove.weebly.com/uploads/1/3/4/5/134595637/4721800.pdfIn PDF document text
    • https://jizidetaji.weebly.com/uploads/1/3/4/6/134626841/3140352.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dobupefibukin.epizy.com/sbs_tv_guide_brisbane_tonight.pdfIn PDF document text
    • http://zuzaxitiruxojax.epizy.com/xfinity_xr2_remote_not_working_with_sony_tv.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_off0000be03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE03 5504 bytes
SHA-256: 4f3efcbc34cdff07fd51d9748f383cc734d4772b21e7b575b8c0792b27eb594c
font_01_sfnt_off0000d0bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0BC 9684 bytes
SHA-256: 9066d9c4c07c2a0f288c284d1c40bb46dbe7aebcce0d89d7da7834db3d3f1518