Malicious PDF — malware analysis report

Static analysis result for SHA-256 96959e9100d0f86a…

MALICIOUS

PDF

86.3 KB Created: 2021-04-02 04:41:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: de72961f7f46b88b352ce3f1322a3ec3 SHA-1: d8888d97c52b24ec6abe409d4f4dacadf8e3865f SHA-256: 96959e9100d0f86a7cac148eda50e157e28c2f1d884e1263319ac7eeb3847e69
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and link farms, indicating a likely phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/123?utm_term=bewars+telugu+songs
    • http://zapitexidij.mypressonline.com/brautlied_text.pdf
    • http://winoorama.fun/25373730858tpd7y.pdf
    • http://pimuxiv.22web.org/assassin_s_creed_odyssey_dlc.pdf
    • https://cdn.sqhk.co/nolagutotato/ghgTTje/67898840244.pdf
    • http://finovadi.iblogger.org/handling_anger_worksheet.pdf
    • http://toppiksnack.xyz/how_to_clean_portable_ac_condenser_coils5ruoj.pdf
    • http://smartcreditcheck.info/caramel_frappe_mcdonalds_nutrition_information71785.pdf
    • https://cdn.sqhk.co/sevijeruba/iha3giq/guitar_rock_hero_prodaja.pdf
    • https://cdn.sqhk.co/bosamame/ijvPhdq/business_management_books_to_read.pdf
    • https://cdn.sqhk.co/girewobo/iggfja4/42557574947.pdf
    • http://rcasino.info/corresponding_sides_and_angles_worksheetl6eqv.pdf
    • http://bifixofunoxov.iblogger.org/free_logic_puzzles_worksheets.pdf
    • http://idealica-italiaoficial.site/tokyo_ghoul_re_call_to_exist_ps4_digitalkb59d.pdf
    • http://tidivon.iblogger.org/les_caprices_de_marianne_de_musset.pdf
    • http://mikovil.mywebcommunity.org/64819746570.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://vufufule.epizy.com/letamafitewalazewe.pdf
    • http://wemiwapava.epizy.com/celine_tam_songs_mp4.pdf
    • https://uploads.strikinglycdn.com/files/bbb6eaec-1a6a-43c5-b231-32d22375d90e/dr_william_donald_kelley_one_answer_to_cancer.pdf
    • https://uploads.strikinglycdn.com/files/edb2d99e-ee8c-4e7c-9ee5-67475249aa0d/69256576315.pdf
    • https://uploads.strikinglycdn.com/files/5452d1a8-0bee-44f7-b5b2-e315e1eef5b0/6240951158.pdf
    • https://uploads.strikinglycdn.com/files/9feb20b1-6da5-4952-acad-1780ded047b6/tales_of_a_fourth_grade_nothing_analysis.pdf
    • http://pejenusiloxo.rf.gd/how_to_change_battery_in_eco_drive_citizen.pdf
    • http://joxumokuri.epizy.com/salvar_tu_vida_alice_miller_gratis.pdf
    • http://rolozipufulelo.rf.gd/immigration_citizen_test_questions_and_answers.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000116e1.bin
3d03c52343d5b16fa1d21cd780f0750166f768402e2769e0a65dd97cb03eae8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x116E1 4996 bytes
font_01_sfnt_off000127fd.bin
ec6c98b0001d1529c5d7edc5b73cb00a7fc26e511239f46c987ef9e5c74b1304		 pdf-font-stream PDF embedded font (sfnt) at offset 0x127FD 11012 bytes

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