Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad66895ba0b270c4…

MALICIOUS

PDF

71.3 KB Created: 2021-03-31 02:43:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b73bea0e8d9960fdb5dc3bf25b597fea SHA-1: 9fd0382c8470d9d8b59b3f03818ab2daa2d7041e SHA-256: ad66895ba0b270c4c70860ad51da3b71971fbf4f1dc43074a4610878c78cf66d
66 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/strik?utm_term=sun+tracker+pontoon+boat+trailer+parts PDF link annotation
    • https://cdn.sqhk.co/vitimosugu/ssggMhi/gofofopitamuremezumi.pdfIn PDF document text
    • http://takodevizol.iblogger.org/97283182371.pdfIn PDF document text
    • http://sepoxudozixo.sportsontheweb.net/calendario_rusia_2020_chile.pdfIn PDF document text
    • http://ilook.market/ge_washer_timer_repairqz44q.pdfIn PDF document text
    • http://meetly.space/free_new_living_translation_bible_download_for_ipadep6o3.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/xQesWgf/hitman_sniper_game_for_pc_free_download.pdfIn PDF document text
    • http://fidesuwuranotif.getenjoyment.net/approaches_and_methods_in_language_teaching_jack_richards.pdfIn PDF document text
    • http://reetodo.online/renotalasimloj0.pdfIn PDF document text
    • https://cdn.sqhk.co/sovanoniwuva/aLiaibi/fupudimuvololanimi.pdfIn PDF document text
    • http://net-klientov.ru/riruwitwmlw2.pdfIn PDF document text
    • http://metazoaapc.fun/que_importancia_tiene_la_linea_de_montaje_en_la_pelicula_tiempos_modernosetwoo.pdfIn PDF document text
    • http://lorakuze.sportsontheweb.net/87259050638.pdfIn PDF document text
    • http://tdsevsvet.ru/acute_and_chronic_gastritisa0kzx.pdfIn PDF document text
    • https://cdn.sqhk.co/sepolulegaba/iegcpPY/tezelitipakanemozetula.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dogekozi.epizy.com/nenuf.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/99975085341.pdfIn PDF document text
    • http://losaleludaguxes.rf.gd/basic_ibm_mainframe_assembly_language_programming.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/the_beguines_who_established_informal_communities.pdfIn PDF document text
    • http://tuguvedora.rf.gd/send_email_with_attachment_in_php.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/celine_dion_love_you_more_music.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_off0000da22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA22 5236 bytes
SHA-256: 784460700d7ff6f1ef9d1027ef9ca6be22c97ec83c67de94d198a2e9cd5f6cd2
font_01_sfnt_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 10560 bytes
SHA-256: 1d6ad626b5328f05596c4a9857e0456ee19f0067cda6d9beae468cc3cf759ffa