Malicious PDF — malware analysis report

Static analysis result for SHA-256 89fd8c0856389b5f…

MALICIOUS

PDF

81.0 KB Created: 2021-03-19 23:54:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 05e74e54a8fdfd341f9c7071686c6be2 SHA-1: a1d7085b9a3aae1c9de9562f854e354f72f286a7 SHA-256: 89fd8c0856389b5fe9a7d6d6f7a078740226563ff16ba180f36b0d1eff4c3c51
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting or known malicious redirectors. The primary function appears to be a link farm designed to direct users to potentially harmful websites, as indicated by the PDF_SEO_LINK_FARM and PDF_MALICIOUS_REDIRECTOR_LINK heuristics. While no scripts were extracted, the structure and heuristics strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • 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://dafemum.ru/award?keyword=alzheimer+s+disease+thesis+pdf In PDF document text
    • https://kakowafalajoji.weebly.com/uploads/1/3/4/4/134455686/galuzafadu-soxamekutagozav-tezivur.pdfIn PDF document text
    • http://depupejaxidolip.22web.org/wijobugibopok.pdfIn PDF document text
    • https://wifiluguzuz.weebly.com/uploads/1/3/1/4/131437957/7334126.pdfIn PDF document text
    • http://kesisekojabaz.iblogger.org/vigadisomivedudev.pdfIn PDF document text
    • https://nimuneroz.weebly.com/uploads/1/3/1/4/131407882/2e30aeb8f23fbde.pdfIn PDF document text
    • https://vemakovuzabomon.weebly.com/uploads/1/3/4/8/134881214/9934fc3761b3.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
    • http://manutilo.epizy.com/76425198282.pdfIn PDF document text
    • https://s3.amazonaws.com/jasipefulaxiduj/diploma_civil_engineering_books_in_tamil.pdfIn PDF document text
    • http://romefapum.rf.gd/how_to_install_evenflo_pivot_car_seat_without_base.pdfIn PDF document text
    • http://nogojituwizax.epizy.com/drowning_a_boogie_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/370b05cd-0542-4100-9658-02c77e58f273/arduino_sketch_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/construction_industry_ohs_standards_and_guidelines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a892e573-058a-46bf-81f2-523a8c0750cb/drug_information_handbook_for_dentistry_20th_edition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78ec11fd-9b81-4320-b8e4-dfc1a0a4d94e/8408294043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a06bc297-7d17-4375-91a8-e8ec63efaa6d/do_short_term_traders_make_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52823a68-72d4-42a3-a70d-825ab5e8f65f/binojuwudelogosit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97e0012b-1640-4b0c-944e-babbb2c29e6e/the_man_in_the_high_castle_season_4_episode_2_watch_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4499e9d4-91ad-46dd-9692-6ab87f67c19c/how_to_write_log_base_2_in_calculator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c30a15c-1c40-4d81-a5a3-5bef1ada2610/how_to_draw_a_face_easy_boy.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_off0000f2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FF 4892 bytes
SHA-256: 19a3b14ae2dcfbc086a2cef8201682cbf24b0339083cfcb0269125ddbc0464ab
font_01_sfnt_off00010397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10397 10932 bytes
SHA-256: a01b8e070435098f6475dfcaaeedba5ab2d2f551dc7946b648b8cdd8a0595a5c
font_02_sfnt_off000128c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C4 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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