Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4826ddc4966cf0c…

MALICIOUS

PDF

73.3 KB Created: 2021-02-05 13:37:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 154810a30273f86462a110e3b1ed4def SHA-1: 734250e7d54eae0e13d98b65cefa82200b76c459 SHA-256: d4826ddc4966cf0c02f9a9bb991c9c1406de6a2ba6564071f411435b1c095fb2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://baarspo.ru/wb?keyword=dictionary%20english%20french%20free%20%20pdf PDF link annotation
    • https://cdn.sqhk.co/perigupa/hgSyYji/nefosubunelojubel.pdfIn PDF document text
    • https://gibejeki.weebly.com/uploads/1/3/1/4/131438187/butoza.pdfIn PDF document text
    • https://nabusaguvelono.weebly.com/uploads/1/3/4/0/134095838/8459030.pdfIn PDF document text
    • https://noperutepa.weebly.com/uploads/1/3/4/7/134721309/711967.pdfIn PDF document text
    • https://cdn.sqhk.co/muvifisi/nhbdido/superheated_steam_properties_online_calculator.pdfIn PDF document text
    • https://xogalorezekulim.weebly.com/uploads/1/3/5/4/135400954/memowuvekuronaj-tesopifi-bufojakideze-muxudaduzam.pdfIn PDF document text
    • https://cdn.sqhk.co/wokowuvawuz/idgdphh/.pdfIn PDF document text
    • https://cdn.sqhk.co/kebubupoxiz/bZgfhfP/fotivudix.pdfIn PDF document text
    • https://cdn.sqhk.co/feluxolid/nzhgfig/big_bang_whippet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zedotedifajo.epizy.com/antibodies_test_report.pdfIn PDF document text
    • http://rulumagevamed.epizy.com/terapia_del_dolore_farmaci.pdfIn PDF document text
    • https://s3.amazonaws.com/zatazewoz/whatsapp_status_video_odia_song.pdfIn PDF document text
    • http://vifudirowu.rf.gd/wobalusovidivazezovoxoma.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/boondocks_theme_song_instrumental.pdfIn PDF document text
    • http://jikibepedoroto.epizy.com/go_math_book_8th_grade_answers.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_off0000e151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE151 5516 bytes
SHA-256: c19bb8e8e8ea976101bd37e43354b28b657ee5199260fe87d9e37292eb59832a
font_01_sfnt_off0000f41e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF41E 10588 bytes
SHA-256: 48cc8f3a8cc500738a3cccf59a897b43c0abf8a182db7512f9b2a4cc8a710683