Malicious PDF — malware analysis report

Static analysis result for SHA-256 21230c4efe51e92e…

MALICIOUS

PDF

70.1 KB Created: 2021-02-24 07:57:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 117d892db1d0690672e47d123a3dc6f1 SHA-1: cf59c1c34cb2d4cdd822b453690d23c8cb38bfb5 SHA-256: 21230c4efe51e92e701ea69cf0c2b601f76c1520978476e40b71438872563b1f
126 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
  • 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://maypoin.ru/wix?keyword=vocab+level+g+unit+7+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4446170/normal_601e8277268f1.pdfIn PDF document text
    • http://natfreshik.fun/31094137529ql6n.pdfIn PDF document text
    • http://devlp.club/what_channels_are_included_in_dish_top_25036nbg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450625/normal_6020182f8231a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489848/normal_5fedf2f77e580.pdfIn PDF document text
    • https://cdn.sqhk.co/mifodirula/hihukjd/70179682942.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393644/normal_5ffbfb021f33e.pdfIn PDF document text
    • https://cdn.sqhk.co/pometobab/g95gc8G/metaphysics_books_barnes_and_noble.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/jfijeid/xutujixevazu.pdfIn PDF document text
    • https://cdn.sqhk.co/tulotunofuz/ggnajha/halloween_party_themes_for_adults_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lojibuwe/ehbtrii/dinosaur_world_kentucky.pdfIn PDF document text
    • https://cdn.sqhk.co/puwidebudojo/iaugiji/gt_turbo_car_driving_simulator.pdfIn PDF document text
    • https://cdn.sqhk.co/waxobakal/ih0hbhh/nemenolefafoto.pdfIn PDF document text
    • https://cdn.sqhk.co/fakodozug/t1BQtja/59662081296.pdfIn PDF document text
    • https://cdn.sqhk.co/fepexeguma/hrfTja1/pocket_little_pony_18.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484834/normal_601a5cbc3c0c2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ditatunejapazik.epizy.com/choke_chuck_palahniuk_book_review.pdfIn PDF document text
    • http://xigutawime.epizy.com/supilujug.pdfIn PDF document text
    • http://ronojegev.rf.gd/cashflow_game_app_apk.pdfIn PDF document text
    • http://didopip.epizy.com/tcs_campus_commune_registration_form.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_off0000d744.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD744 5304 bytes
SHA-256: 919902f59de3bf5db4e670c5ae47e0cea65d9cf6bdd9c977539e89d4b12158bc
font_01_sfnt_off0000e981.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE981 9812 bytes
SHA-256: 15cd82058ea5107989af5b7b32db34ec483e9f3748b38e26f13585176c246d7e