Malicious PDF — malware analysis report

Static analysis result for SHA-256 8edf25108b9944e7…

MALICIOUS

PDF

77.3 KB Created: 2021-02-09 07:12:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: bbab4c15bdbd25cc2e9e6c4efd1a4308 SHA-1: e3f895574f629d3ac4891f2ac3605b30f5e6311a SHA-256: 8edf25108b9944e77ee8fa5c89899a5e4e49b38167521010375de42eba2f53d0
244 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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 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.
  • 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/wb?keyword=image%20assets%20android%20example In PDF document text
    • https://cdn.sqhk.co/gonolesuzam/alU7giA/64605956992.pdfIn PDF document text
    • https://modefijibig.weebly.com/uploads/1/3/6/0/136011483/4634311.pdfIn PDF document text
    • https://cdn.sqhk.co/vetukalujir/hhJfihd/playstation_plus_monthly_games_january_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380384/normal_5fd34b2e228b2.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/ghhchfC/juwakubetalopawifi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492600/normal_5fee9219c99fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368251/normal_601b08242b73c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451350/normal_5fd76a46ce5a6.pdfIn PDF document text
    • https://kaxogirigajel.weebly.com/uploads/1/3/4/6/134611066/ditupulovujuz.pdfIn PDF document text
    • https://cdn.sqhk.co/feketukadoz/hRqieZP/baixar_sticker_studio_sticker_maker_para_whatsapp.pdfIn PDF document text
    • https://mujunuduxur.weebly.com/uploads/1/3/5/3/135327440/31ef0e6.pdfIn PDF document text
    • https://rezapikuxodet.weebly.com/uploads/1/3/0/9/130969426/detimijip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://surobufalinaxis.epizy.com/fonoxiwosajoguva.pdfIn PDF document text
    • https://s3.amazonaws.com/varoximu/75135738146.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/62175216825.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_off0000efd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFD7 5284 bytes
SHA-256: 9e492e035b5d3d043fcfc0537b5f08f76a2f90294d2fa55a61894c3eb3d02bc2
font_01_sfnt_off000101b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101B8 11404 bytes
SHA-256: 465ec55be0b9be3e54f95f2eeead3b8a5e2c80903d46d8f4c10702d1235ac889

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