Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c69ed0dc4d1862e…

MALICIOUS

PDF

68.7 KB Created: 2021-02-14 16:48:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 0631bb31da26fed8a8b466760fafb9a1 SHA-1: 1aabaf93edca600c265f60fa2b8d9aac1f771f02 SHA-256: 3c69ed0dc4d1862ec2e8db02224755f22c486cf1f9deb2cbe3a8fc1f4a785170
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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
  • 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://jottigo.ru/wb?keyword=backgammon%20game%20rules%20pdf PDF link annotation
    • https://cdn.sqhk.co/rinezodoniga/eggih4j/descargar_the_world_ends_with_you_en_espanol.pdfIn PDF document text
    • http://gawewatejunowib.iblogger.org/jevuwezitevekamopa.pdfIn PDF document text
    • http://logorag.22web.org/invitations_wedding_templates.pdfIn PDF document text
    • http://dazefoxezizu.iblogger.org/bihar_tet_question_paper_2017.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/urhjihh/camera_studio_minecraft_1._15._2.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/ijFuhbn/the_trails_apartments_nashville_phone_number.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/iiISIij/drag_racing_duel_and_street_race.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/jujojomojemiz/mapa_islas_baleares_formentera.pdfIn PDF document text
    • http://lajimaju.epizy.com/royal_canin_development_puppy_canned_feeding_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/applied_vs_fundamental_research.pdfIn PDF document text
    • http://lagamifex.epizy.com/98657027923.pdfIn PDF document text
    • http://podazowek.epizy.com/ropiladubiboxitiraz.pdfIn PDF document text
    • http://xeravujowa.epizy.com/difference_between_asbestos_and_non_asbestos_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/xifabilejilab/windows_office_2010_activator.pdfIn PDF document text
    • http://menoziduwuju.epizy.com/26402915425.pdfIn PDF document text
    • https://s3.amazonaws.com/sesijesule/business_case_template_filetype_ppt.pdfIn PDF document text
    • http://wulekugigewipo.epizy.com/game_biohazard_apk_mod.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_off0000ceff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFF 5588 bytes
SHA-256: 7bd55e320a65118a72f276cbc7460aabdf5dbe88c508fc6d764ee7f0e59e53a9
font_01_sfnt_off0000e1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F2 10656 bytes
SHA-256: c31f1779090a1dabeb9bd8b81c233c2c0363c53b4136ab2bf67042cc60249674

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