Malicious PDF — malware analysis report

Static analysis result for SHA-256 5de231f82448b2cf…

MALICIOUS

PDF

81.0 KB Created: 2021-03-21 03:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9d028eb97b7b6209a91e731fb5a0a3f5 SHA-1: 00d8eacbd526cd7f7055ee0fd10cac2a65c54856 SHA-256: 5de231f82448b2cf3cca68aa87b113206c1e0304443eed529bc6eafd227a2427
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are associated with link farms, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the presence of external URIs and the nature of the heuristics suggest the document is designed to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 5

  • 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 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://jumiwimov.ru/strik?utm_term=how+to+dim+lights+on+hunter+fan PDF link annotation
    • http://energytik.net/defufojakovotezi2y5i5.pdfIn PDF document text
    • http://hookup682.site/chamberlain_liftmaster_professional_formula_1_troubleshootingffjn4.pdfIn PDF document text
    • http://greenbike.shop/kung_fu_panda_3_full_movie_download_300mbh1a7o.pdfIn PDF document text
    • http://lg-supportteam.com/76970973865u49of.pdfIn PDF document text
    • https://cdn.sqhk.co/kuvapipitol/Yjiyhfl/91060518366.pdfIn PDF document text
    • https://cdn.sqhk.co/favosejo/he1ifYz/72770077605.pdfIn PDF document text
    • http://help-igcopyright.xyz/vekarivezujivitavuxijokuj893b.pdfIn PDF document text
    • http://vostokzapad.su/world_of_warcraft_audiobooks_freezgflp.pdfIn PDF document text
    • https://cdn.sqhk.co/nonuripot/hbgCjfN/tekexakuw.pdfIn PDF document text
    • https://cdn.sqhk.co/gobuwovuv/S7hgVwh/burn_your_fat_with_me_fg_full_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/rotefuver/g3haid6/befetowaxebafikaso.pdfIn PDF document text
    • http://dress-russia.ru/44901495285aixcv.pdfIn PDF document text
    • http://peuly.xyz/who_won_the_most_golden_ballsw9vpq.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikijun/ijgjfKS/japanese_auction_sheet_explained.pdfIn PDF document text
    • http://emirofficialzm.com/archer_farms_ham_cooking_instructionswr7g5.pdfIn PDF document text
    • https://cdn.sqhk.co/lidupusumoj/dBgijhf/diraxubip.pdfIn PDF document text
    • https://cdn.sqhk.co/kobewudojuvo/e6ghGvu/super_dancer_chapter_3_winner_rupsa_performance.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://uploads.strikinglycdn.com/files/ca6eb429-1a44-4ce1-9914-38a841497556/similarities_between_romeo_and_juliet_book_and_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88f0419-c29d-42b4-83c6-e8d4f41db82c/kawasaki_prairie_400_4x4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec447509-e9cb-444d-a437-94e3b431e6e7/66826818354.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/779cd61c-9293-40f2-99d6-bb57af7ba5df/78812416119.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40779757-7d04-4d1c-828c-833ce574ed98/54996499318.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a5f5b87-0360-42d4-b92d-8a87b2d68399/twas_the_night_before_christmas_poem_printable.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b97ad79b-2351-453c-814b-41323273923d/the_secret_life_of_the_american_teenager_full_episodes_season_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91152c12-c390-4175-b79a-5ffc8de1807f/23796593949.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8c66efa-dbe4-40b5-bdc5-2388a79d3572/98759912606.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49cfd8fc-dd37-42c1-9876-442e523b0916/here_i_am_lord_mp3_song_download.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_off0000f215.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF215 5256 bytes
SHA-256: 73a23b4cd9e2418815257003c317bba4dc883c3d15f76704da39798ce235e4dd
font_01_sfnt_off000103e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E0 10656 bytes
SHA-256: 250b012ec1a689702b6d74f9b4c170f4d20b6ae7b4347daf1308f514a84bc46f
font_02_sfnt_off0001282b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1282B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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