Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef58c59494cc6dd0…

MALICIOUS

PDF

68.4 KB Created: 2021-02-26 06:51:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b272928c2c6531207c4972a3515c515e SHA-1: 3707b5e701a96b3c42fb7258ce5e6e3594e519d2 SHA-256: ef58c59494cc6dd0b54c8a987d2575ed9f0d8a57a10376dc06e6a45219b67757
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://jottigo.ru/award?keyword=the+useful+knots+book+pdf PDF link annotation
    • https://dunomomavelow.weebly.com/uploads/1/3/1/4/131407267/819606.pdfIn PDF document text
    • https://cdn.sqhk.co/tivuzofep/xgijejh/world_war_i.pdfIn PDF document text
    • https://xovewelokajefi.weebly.com/uploads/1/3/4/8/134864882/dodagolifozuvevop.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/bulizorulox-tikepun-wevorotiju-sipinegixoxe.pdfIn PDF document text
    • https://nimugafibe.weebly.com/uploads/1/3/6/0/136084612/9617958.pdfIn PDF document text
    • http://jevafurevozu.mygamesonline.org/are_audio_technica_good.pdfIn PDF document text
    • https://wijugola.weebly.com/uploads/1/3/2/3/132303023/xitadegimu_xiwatoperafakix.pdfIn PDF document text
    • http://zimezobot.getenjoyment.net/calories_in_rice_per_cup.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwufupi/e9hdgdy/4d_sniper_free_online_shooting_game_fps.pdfIn PDF document text
    • https://cdn.sqhk.co/zebimapajod/gjjaij8/81180017577.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bejikefowu/newton_s_laws_worksheet_grade_11.pdfIn PDF document text
    • http://xinifaduzinuvu.onlinewebshop.net/86342811411.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/charlatans_robin_cook_free.pdfIn PDF document text
    • http://wulibazosuxib.onlinewebshop.net/briggs_and_stratton_small_engine_replacement_parts.pdfIn PDF document text
    • https://s3.amazonaws.com/folexapurilowe/96920799078.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_off0000d054.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD054 4976 bytes
SHA-256: 37ebcd5e681a62c7d009f0cac083b34e4ec23b395b7eab44705a751e7e56b2ac
font_01_sfnt_off0000e13e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13E 10476 bytes
SHA-256: 0448b9c09bdbb9642d6afc1fb93c7ab7f0337f2f0c3f0057ebd4c52142719396