Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a571ee4ef3ac973…

MALICIOUS

PDF

81.7 KB Created: 2021-02-28 01:12:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 0bebc6ca3fb417004d97fd1a6053239c SHA-1: ab39a2bf4066e402d47637d1905bd642b849d547 SHA-256: 9a571ee4ef3ac97367338b76b2d1a3fd2b2c6863776f4dfba4d73654e829485d
244 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
  • 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://dafemum.ru/wix?keyword=antigone+study+guide+scene+1 In PDF document text
    • https://cdn.sqhk.co/seworani/igpsijc/87357932944.pdfIn PDF document text
    • https://lekopejener.weebly.com/uploads/1/3/5/3/135323345/jafobu.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/zaxadazivamo_kovisikofesomo_jivanomoviw_pifazibipuzan.pdfIn PDF document text
    • https://cdn.sqhk.co/papowepu/zhg9ib3/free_homeschooling_curriculum_uk.pdfIn PDF document text
    • https://xamoxuwubedus.weebly.com/uploads/1/3/2/8/132814415/bulonol.pdfIn PDF document text
    • https://sarowamirubene.weebly.com/uploads/1/3/4/7/134736793/b6ff30135be8a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382190/normal_5fc792e490e30.pdfIn PDF document text
    • https://cdn.sqhk.co/vagewovupug/hfhccje/remix_os_player_mac.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/4df5820bc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489414/normal_6039fc40cd819.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393900/normal_600080a7539b2.pdfIn PDF document text
    • https://vipigenomunopem.weebly.com/uploads/1/3/1/3/131398348/povazomitu_wuvob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393183/normal_6035503ed1241.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saxodanokijaj.atwebpages.com/what_is_the_best_food_saver_vacuum_sealer_to_buy.pdfIn PDF document text
    • https://s3.amazonaws.com/bizamesuwepe/abundance_prayer.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/clifton_beach_tas_surf_report.pdfIn PDF document text
    • https://s3.amazonaws.com/muvojugejoxip/velela.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/c_interview_questions_geeksforgeeks.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_off00010468.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10468 4912 bytes
SHA-256: c044df5826522540d3c0a6e1cb9aea3ef0b8ae6589258acf5f6912ea1fc4a8d9
font_01_sfnt_off0001154f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1154F 10692 bytes
SHA-256: 7b00fc5fc076257b67eafc52a118be8e11d198dd76fc28a359f642bca948843e