Malicious PDF — malware analysis report

Static analysis result for SHA-256 509a979453c11700…

MALICIOUS

PDF

77.9 KB Created: 2021-05-06 17:59:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3e06516127bd9a5ef56aa22c7dfc4455 SHA-1: 5b0f30b89ce013b526fb7aee10cbee569a0f6444 SHA-256: 509a979453c1170030cc8e9af458c47823844e442875a189f2d5af54e0c65147
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://lozipotod.ru/strik?utm_term=kafka+short+stories+reddit PDF link annotation
    • http://munupesifak.22web.org/33696010244.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/MfWjeic/puzzle_bubble_games_online.pdfIn PDF document text
    • https://cdn.sqhk.co/javijaxim/gj8jhjn/how_to_make_solar_system_project_working_model.pdfIn PDF document text
    • https://cdn.sqhk.co/kowukogifaw/hj9nzic/js_tutorial_point.pdfIn PDF document text
    • https://cdn.sqhk.co/wisulekekij/eohagij/91993284959.pdfIn PDF document text
    • http://tarusexozof.iblogger.org/98529863787.pdfIn PDF document text
    • https://cdn.sqhk.co/wifilivemij/jjgiaoR/1851618172.pdfIn PDF document text
    • http://wiwafapudipib.iblogger.org/48443447145.pdfIn PDF document text
    • https://cdn.sqhk.co/lasumalena/jibjeih/58065612735.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/ggjbjjr/grumpy_cat_memes_christmas.pdfIn PDF document text
    • https://cdn.sqhk.co/bisadidizi/4hdF1hj/buzzer_beater_rocket_league.pdfIn PDF document text
    • https://cdn.sqhk.co/gelowidabik/hxAjijf/84413983589.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gujodelabugujaf.rf.gd/divuzavafovafunidufi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb47e464-af1b-4cd5-aef5-ed66d07a5c39/masumejir.pdfIn PDF document text
    • http://gadusevi.rf.gd/anyway_you_can_annette_bosworth.pdfIn PDF document text
    • http://maviwapas.epizy.com/dumbbell_bicep_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e9eec2f8-1891-4012-88d2-94a4e764119d/what_does_it_mean_to_be_literate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/173b4215-b791-4bcd-97f7-17d31032b46a/what_do_black_moles_signify.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac62df70-1b65-4392-abe9-f688c2be372d/how_to_google_maps_street_view.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/05d34c7a-c8c1-4f1a-8da2-064da0bff6e2/word_game_answers_5_letters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d38a34c-06c2-4f29-b38a-0624612992b4/zenazutigewunub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f25ec9b-d4ee-4dac-a5fd-a1d019c1775f/harry_potter_and_the_goblet_of_fire_movie_plot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c6e7f9c-1cf5-4940-b3f0-103b5799a1ce/how_to_draw_cartoons_animals_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/508fef9d-f77f-46f0-8422-0d892e055146/nuzetozamugew.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_off0000f1af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1AF 4996 bytes
SHA-256: 9af17ced3fb4075258cc1eb1cb7902fe7962447eb77f65544d2760da1c94f0f0
font_01_sfnt_off000102a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A9 10940 bytes
SHA-256: 883a2b75a7d881fe12619a01dcfc6baa7320a4e712ac0ccafce699ca535bedfe