Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0183a2ec9d89dce…

MALICIOUS

PDF

77.7 KB Created: 2021-04-02 02:34:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 97b9278f34c8b8fd983311ebf8b73294 SHA-1: 10c853a74634b3519873ef92a8f8862eaac4bf9e SHA-256: e0183a2ec9d89dcef2e72dfdf65677c75c3b0519d34a7d835dff0bdf378a1b99
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a malicious intent to redirect users. The ML classifier strongly flagged this PDF as malicious. Although no scripts were directly extracted, the presence of numerous external URIs and the link farm heuristic indicate a likely phishing or scam attempt, possibly involving a secondary payload delivered via JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://dugedepap.ru/strik?utm_term=son+lois+lowry+summary PDF link annotation
    • http://nokexukuzifuv.22web.org/89136426026.pdfIn PDF document text
    • http://dietnatur.fun/pugazugasijoselh6p5.pdfIn PDF document text
    • http://dkmz3.club/sri_vishnu_sahasranama_stotram_telugug9nj6.pdfIn PDF document text
    • http://gatorama.site/wokinqlqse.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/1cgi7ii/addams_family_pinball_spare_parts.pdfIn PDF document text
    • https://cdn.sqhk.co/zasemewiti/cqGnja0/41097786281.pdfIn PDF document text
    • http://banquepopulaire-fr.org/kirby_vacuum_will_not_turn_onzm0bu.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/fjejdgl/18481486674.pdfIn PDF document text
    • http://sifusebidokud.iblogger.org/abbyy_flexicapture_user_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/gutinisiv/hD7gUSA/paper_folding_frog_step_by_step.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://kizosala.epizy.com/teacher_guide_grade_6_science_4th_quarter.pdfIn PDF document text
    • http://gateguka.epizy.com/authorization_header_format_must_be_bearer.pdfIn PDF document text
    • https://s3.amazonaws.com/jedaxopopuko/pixeditufufozisulavid.pdfIn PDF document text
    • http://badujesunafoso.epizy.com/16129740396.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/42891324375.pdfIn PDF document text
    • http://kuposefo.epizy.com/capstan_and_turret_lathe_machine.pdfIn PDF document text
    • http://dopuviboxew.rf.gd/warforged_acronym_names.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8B6 4812 bytes
SHA-256: 7facac1d31bf52ad30f2c82cbe4bd6e6aa59295e4d44eafa5fde75c90809b710
font_01_sfnt_off0000f8eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8EB 10284 bytes
SHA-256: 664f20ee5750841ea2f907e19ebc8de7362ea793d24dbab78c152ba4f766aee1
font_02_sfnt_off00011bfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BFE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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