Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd45b3be11ddce62…

MALICIOUS

PDF

77.5 KB Created: 2021-03-20 18:29:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 36eac15d0441f158a1283167c77f3407 SHA-1: b174364f67f54be1f94bd48563ec1577accb4e06 SHA-256: dd45b3be11ddce62eb6aba2662d458f644e903392a4b714fed3153bb5705763c
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing and link farm attack. It contains numerous external links, many hosted on disposable domains, designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, suggests a lure related to "Deadpool comic book" to entice clicks on these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://pelibifir.ru/strik?utm_term=deadpool+comic+book PDF link annotation
    • https://cdn.sqhk.co/totafeta/slijigI/sepagutuxuvipigugufag.pdfIn PDF document text
    • http://supesanav.iblogger.org/audit_practice_and_assurance_services.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/50224375645.pdfIn PDF document text
    • https://cdn.sqhk.co/beledufe/jfjjhii/love_letters_in_the_sand_pat_boone.pdfIn PDF document text
    • https://cdn.sqhk.co/kiribikiv/ehficgi/app_lock_fingerprint_password_pro_apk_download.pdfIn PDF document text
    • http://xifadezuzurap.medianewsonline.com/paulo_coelho_the_alchemist_audiobook_free_download.pdfIn PDF document text
    • http://gepuladetageton.22web.org/53701342692.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/jDSihqg/does_atlanta_have_a_classical_music_radio_station.pdfIn PDF document text
    • http://maxoranano.sportsontheweb.net/book_of_jasher_audio_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/jibenapola/CHgeCSu/finilun.pdfIn PDF document text
    • http://fagilef.getenjoyment.net/22471947626.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
    • https://s3.amazonaws.com/lewuli/brene_brown_definition_of_a_leader.pdfIn PDF document text
    • https://fdb0147f-387d-4908-9c93-1ccdb5bf775f.filesusr.com/ugd/aea2e0_fd44f1d33c8342a3902e3b2684148456.pdf?index=trueIn PDF document text
    • http://duribolatajofa.atwebpages.com/los_cinco_lenguajes_del_amor_prueba.pdfIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_c12bb7d3667545a3b81710a20450135d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rodiligarexo/58961547616.pdfIn PDF document text
    • https://s3.amazonaws.com/baxekojojexusol/girl_yelling_at_cat_template.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_598509500cb847daa9a5f9e402baa8fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/calma_song_mp4.pdfIn PDF document text
    • http://zoniguzetixan.epizy.com/tarasidofimapagujovuru.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/certificate_template_not_showing_up_in_certsrv.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_off0000e66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE66F 4752 bytes
SHA-256: 4f22330b9ed441c198ed858d047008d47d65c9d2d17a9df1a1ec099226f8dc5b
font_01_sfnt_off0000f693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF693 10732 bytes
SHA-256: 8d72dad251cf5ff8eb3c6bc15fe0c0dc4cae46be6841b29337d8a4672d1f295c
font_02_sfnt_off00011b0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B0E 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f