Malicious PDF — malware analysis report

Static analysis result for SHA-256 b443f7f9d4f2e0cf…

MALICIOUS

PDF

66.6 KB Created: 2021-02-09 11:10:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 704de896dceea671d99bfd9f318d3f97 SHA-1: f11861c9473f7c7d02fb4ea271765bb1bb259ac9 SHA-256: b443f7f9d4f2e0cf9a323f4098594415857477f52441d6c49910a436ecc22d72
184 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://yafferge.ru/aws?utm_term=genosys+sheet+mask In PDF document text
    • http://homebig.space/comixology_unlimited_apk_downloadi4xze.pdfIn PDF document text
    • https://cdn.sqhk.co/zegetaru/ehchc3r/zombie_royale_quads.pdfIn PDF document text
    • http://itfamily.info/marvel_stadium_parking_promo_codevyaon.pdfIn PDF document text
    • http://groby-ritual.online/629001787955xars.pdfIn PDF document text
    • https://cdn.sqhk.co/foroboreb/Ziaicgj/76689743556.pdfIn PDF document text
    • http://reduslim-europa.site/navatukufaxazete3ibha.pdfIn PDF document text
    • http://harkateine.fun/block_diagram_reduction_calculator_ooxhgm.pdfIn PDF document text
    • https://cdn.sqhk.co/duvapegoleva/0GLAfhQ/datububonikudopedozuda.pdfIn PDF document text
    • https://cdn.sqhk.co/luwukamuku/hhjhrGh/blundstone_boots_sale_mens.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/U7KEljg/buyout_offer_letter.pdfIn PDF document text
    • http://govnosiakxws.online/64107666444xx8zp.pdfIn PDF document text
    • http://remontvorot24.com/upsc_exam_information_in_marathi_wikipediazbwha.pdfIn PDF document text
    • http://klyshsheff.xyz/75133987011dcpq6.pdfIn PDF document text
    • https://cdn.sqhk.co/tikikizeveni/hZ3MbWy/jinemetulas.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/sojaxub/moxowidi.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_off0000c616.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC616 4996 bytes
SHA-256: 0e98eafe9009c3e4705e1f475bad3d3b09bf47f181306fc0b2745b870e3e8f3d
font_01_sfnt_off0000d6f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6F6 12192 bytes
SHA-256: e3915b4ece34b7a5660064f6af60f8dedd4f25f107771046f0ba3bded89f1743