Malicious PDF — malware analysis report

Static analysis result for SHA-256 16166e43d81fbc10…

MALICIOUS

PDF

73.6 KB Created: 2021-02-12 05:58:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: bf611b8cc83241e95ab57a4819c53ee9 SHA-1: 4eddafa4a0ba6596983e0564e2498058a725a99b SHA-256: 16166e43d81fbc1043b40631100a6bddf317d867fb10b5349aad1168d3b000f7
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://seumenha.ru/123?utm_term=westworld+season+1+episode+4+full+episode PDF link annotation
    • https://cdn.sqhk.co/jigugabopu/ihnjcib/79528882238.pdfIn PDF document text
    • http://palifagumelu.22web.org/wapda_jobs_2019_advertisement.pdfIn PDF document text
    • https://cdn.sqhk.co/tuzevawu/ggcjcY2/dilorikotuvanege.pdfIn PDF document text
    • https://figokafudifugi.weebly.com/uploads/1/3/1/3/131383964/80851007c82.pdfIn PDF document text
    • https://cdn.sqhk.co/litonesi/hO01Bhf/zapujabunebezodixumikow.pdfIn PDF document text
    • https://cdn.sqhk.co/rexazileka/Jjcge54/3203635038.pdfIn PDF document text
    • https://piwevowukitibe.weebly.com/uploads/1/3/1/4/131454699/00fb366911.pdfIn PDF document text
    • https://koruguliduni.weebly.com/uploads/1/3/4/8/134896859/nufodikofivi_feketisamezo.pdfIn PDF document text
    • https://cdn.sqhk.co/tinolefowi/ljcgigf/the_banner_saga_2_character_guide.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/firigugixujotov/92456606786.pdfIn PDF document text
    • http://gasadilipebafup.rf.gd/66413346216.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/sabbatical_leave_request_letter_template.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/taekwondo_black_belt_forms_itf.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/aluminum_sheet_metal_cut_to_size.pdfIn PDF document text
    • http://vedegisawopuf.epizy.com/acids_and_bases_pogil_packet_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_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 5280 bytes
SHA-256: ba9aac9eee1151bfa159919934230c5134d4805e8a76fda8a04c382be4f246fe
font_01_sfnt_off0000f51f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF51F 10616 bytes
SHA-256: 309357aa947a696bf6a6780e675c2face1ced35761f524f306e9c7f125856de2