Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df08ef644de171c…

MALICIOUS

PDF

81.9 KB Created: 2021-05-14 01:51:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 06a4a59858038688b9e73d2e6c2d425e SHA-1: 55330e80e1d5495d5c28e81f3a277841a241ce69 SHA-256: 7df08ef644de171c8f4d26c7345d6bbd6f5cb75c0f356518a9dda87de513c856
66 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to disposable domains and are designed to redirect users. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier also strongly flagged this PDF as malicious.

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://druttle.ru/strik?utm_term=the+art+of+living+epictetus+quotes PDF link annotation
    • https://cdn.sqhk.co/dedesonor/jjBhhih/75047613624.pdfIn PDF document text
    • http://winclean-shop.space/how_to_play_bombers_in_world_of_warplaneslmx9p.pdfIn PDF document text
    • http://itsamorem.com/29856781582v1z9a.pdfIn PDF document text
    • http://repair-telefonov.ru/light_ball_pokemon_sworddobgs.pdfIn PDF document text
    • https://cdn.sqhk.co/buwowunuras/kQ3ELX5/29023883548.pdfIn PDF document text
    • http://bcipreactivaperu.com/who_does_boxer_symbolize_in_animal_farm4qew5.pdfIn PDF document text
    • http://zumubexupon.22web.org/freakonomics_movie_worksheet.pdfIn PDF document text
    • http://xrootunited.com/xizefekedz1ezf.pdfIn PDF document text
    • https://cdn.sqhk.co/fofotixoz/rieHgfc/xapuwuxoxomu.pdfIn PDF document text
    • http://genusttwsr.fun/jobobajadiludemuximebubep0q6fy.pdfIn PDF document text
    • http://health-top.ru/video_game_awards_2020_game_of_the_yearf9jt8.pdfIn PDF document text
    • http://dezlice.ru/easy_piano_love_songs_sheet_music_freerfpfu.pdfIn PDF document text
    • https://cdn.sqhk.co/xelimibela/hbhgjjK/jellyfin_for_android_tv.pdfIn PDF document text
    • http://clubstore.info/jusifil8jbol.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/8gjgiCW/sesisegumalitusuxalu.pdfIn PDF document text
    • http://fujavexawagul.iblogger.org/terapi_ameloblastoma.pdfIn PDF document text
    • http://portkamesto.site/599294442013cy1h.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gadejoretalul.rf.gd/81530533517.pdfIn PDF document text
    • http://toxezapa.rf.gd/79368195233.pdfIn PDF document text
    • https://aefbb2f1-1cfc-4a48-aab2-d72547d84173.filesusr.com/ugd/2f3ac6_0b9293ce5f1146d7a0e97797c504c6a3.pdf?index=trueIn PDF document text
    • http://depegiwisa.epizy.com/aduro_hybrid_h1_manual.pdfIn PDF document text
    • https://011f98f8-b45f-4578-a2fd-466b530f7845.filesusr.com/ugd/74e905_f193ca88f3d843529dd3c06e60bf4df2.pdf?index=trueIn 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_off00010305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10305 5412 bytes
SHA-256: 773fe11903dc23f265fb2a907a65325bf4f6e4478b0a2b52c44a25db6d21a4a5
font_01_sfnt_off00011573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11573 10796 bytes
SHA-256: b64e06a950e6fdf82d27974fd062b9d9025ad29e6e8e518539628a3d691d2022

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