Malicious PDF — malware analysis report

Static analysis result for SHA-256 dffc9bf280158a40…

MALICIOUS

PDF

81.4 KB Created: 2021-03-13 16:34:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 07aab1f63c7648d023d3ed631e109af1 SHA-1: ee9dba71f46b0c6aec9362c39bc51ed6ce66d16b SHA-256: dffc9bf280158a408fd67c702fb59517f62d4f04ed02d954ea5162cde657aa8e
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, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is designed to host many links on potentially malicious or disposable hosting, likely to redirect users to harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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://fokemale.ru/aws?utm_term=what+is+the+tone+of+the+story+hills+like+white+elephants PDF link annotation
    • http://foxiduwanati.mygamesonline.org/wd_my_cloud_ex2_user_manual.pdfIn PDF document text
    • http://kijofizovurisos.medianewsonline.com/tidulorobis.pdfIn PDF document text
    • http://kmikaerfs.ru/why_is_my_canon_pixma_scanner_not_working7n1o4.pdfIn PDF document text
    • http://giwosoto.sportsontheweb.net/lejipirukakutu.pdfIn PDF document text
    • http://tuxesimufimiti.mypressonline.com/how_do_i_update_my_rca_voyager_tablet.pdfIn PDF document text
    • http://igme.site/exercises_in_spoken_english_cieflgnyxo.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/642090341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458388/normal_6040a9c305d91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4411944/normal_5fed7a0692e69.pdfIn PDF document text
    • http://pedron.fun/66773042626y776a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_5fe7bcbdf194f.pdfIn PDF document text
    • http://arendagg.xyz/infinix_note_7_price_in_pakistan_black_colourzehbe.pdfIn PDF document text
    • http://vimabanu.sportsontheweb.net/rilifumite.pdfIn PDF document text
    • http://janorewaxeno.mygamesonline.org/do_you_regain_spell_slots_after_a_short_rest.pdfIn PDF document text
    • http://zemesod.getenjoyment.net/day_trading_book_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_600c2643b4d99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379029/normal_5ffd833843414.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/85d38100-790e-4e80-9245-d441f31c8e12/zufejadet.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/how_to_change_the_primer_bulb_on_a_ryobi_weed_eater.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83fb5c28-aaf2-4d1c-9807-fba196d6738b/learn_korean_apps_free_download.pdfIn PDF document text
    • http://vumamuv.myartsonline.com/how_to_sync_airtel_dth_remote_with_sony_tv_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1884b6f4-ebe4-4a5b-b2b5-f8f95046435f/31494066336.pdfIn PDF document text
    • http://koriwironawuva.myartsonline.com/jeloxogajekepim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394760f8-a2ab-4324-a356-dd25c88d6e82/12930602101.pdfIn PDF document text
    • http://baletax.onlinewebshop.net/diono_car_seat_installation.pdfIn PDF document text
    • http://wopojofa.atwebpages.com/nusojowabodirenefovolenu.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_off000101cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CB 5260 bytes
SHA-256: 274dd802a0ffd00c265ba5ffc146766acb21ea7311b1a291fc5aa42ea934d800
font_01_sfnt_off000113ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113CA 10384 bytes
SHA-256: f8bac43b6b078d60fce6c837878f51052e3934b4ae9622ef7dc97f692451ae43