Malicious PDF — malware analysis report

Static analysis result for SHA-256 9addc72dfe851069…

MALICIOUS

PDF

79.5 KB Created: 2021-03-20 19:03:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 23d6a1c5e6251f4448bb46f38db794cb SHA-1: 21b0861e180ffb2782fb608613bf09d28f7ec5d3 SHA-256: 9addc72dfe851069cacee9d6bd5e1b9de5aa9bc01bd23135f1e9880f5039a034
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with a prominent one being 'https://fokemale.ru/strik?utm_term=how+to+connect+internet+using+mobile+hotspot'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a malicious intent to distribute phishing or malware. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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/strik?utm_term=how+to+connect+internet+using+mobile+hotspot PDF link annotation
    • http://henrysavbr.site/interior_design_guidelines_bookhvfqd.pdfIn PDF document text
    • http://abreudesigns.com/vutewor7dfp9.pdfIn PDF document text
    • https://vawosikajoj.weebly.com/uploads/1/3/1/4/131438279/buwerogami-wigafitej-vugefogimegefi.pdfIn PDF document text
    • http://kushtanash.ru/nipegodutesurizukegzo8nk.pdfIn PDF document text
    • http://olymptrade.buzz/asymptotes_problems4nvmz.pdfIn PDF document text
    • http://presentinsta.site/driving_learners_book_malayalamjpzc1.pdfIn PDF document text
    • http://dezlice.ru/xomesiropagukajaf3isa.pdfIn PDF document text
    • http://harmony-market.ru/pretty_little_liars_season_7_episode_8_castry2j4.pdfIn PDF document text
    • http://healthit.space/a_pinch_of_salt_poem_answersacnqb.pdfIn PDF document text
    • https://selamosufuk.weebly.com/uploads/1/3/4/4/134463567/garexinefemekilix.pdfIn PDF document text
    • http://fruitik.space/noxirujkkj66.pdfIn PDF document text
    • http://trujillostacoshop.com/adobe_acrobat_2020_serial_number_freekw2lf.pdfIn PDF document text
    • http://woronari.getenjoyment.net/fegefov.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/what_to_include_in_a_film_pitch.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/401f4329-df65-4047-bf74-d3e4962518bc/is_kirito_and_asuna_still_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c98b5e75-fede-4166-9111-770d4e2127bf/91236057825.pdfIn PDF document text
    • https://s3.amazonaws.com/zamemigojat/zisurakaluwepi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5af38f79-54a1-4de1-95aa-d0ed37f80af0/what_happens_at_the_end_of_vampire_diaries_season_7_episode_19.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/winatiturikuf.pdfIn PDF document text
    • https://s3.amazonaws.com/mizeteb/anjaana_anjaani_full_movie_filmyzilla.pdfIn PDF document text
    • http://fepetixapokurob.myartsonline.com/mouse_guard_roleplaying_game_box_set_2nd_ed.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00be58d0-c76d-4c78-9b5e-a3ca5af7df67/how_much_does_a_psychologist_make_per_month.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/finoratewip.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/zunafomutesagojagoxebe.pdfIn PDF document text
    • https://s3.amazonaws.com/bisegilupuf/jojena.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_off0000f79b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF79B 5332 bytes
SHA-256: 93127d2a21a38fe1bc183744cf9c26f9d0a187a38a3e4c73b41e92d7439c9423
font_01_sfnt_off000109a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109A2 10708 bytes
SHA-256: b615b3a9815a32fe85a709120da5559bd958518694bb734d9aaa372570ee638d

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