Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a804e2b322c0ddf…

MALICIOUS

PDF

82.0 KB Created: 2021-03-24 17:30:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e7f551392dc620f92c0159e512aae0ae SHA-1: f45c46879b140f9083aae5646ef6fc83ce365afd SHA-256: 0a804e2b322c0ddf0c8b8a71b02b1a8d7a7a4ebebf43327c2cbe65215d095fb3
126 Risk Score

Malware Insights

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

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers. It contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a likely phishing or malware distribution attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=absalom+absalom+pdf+espa%25C3%25B1ol PDF link annotation
    • http://carbags.site/how_to_port_my_number_to_verizonsdnxi.pdfIn PDF document text
    • http://zhk-rekord.info/how_to_draw_anime_hair_easy_girl878gl.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/viguluxipofinajagev.pdfIn PDF document text
    • http://meetchambre.xyz/sat_practice_test_10_answer_key7t53c.pdfIn PDF document text
    • https://cdn.sqhk.co/nigigeje/16PjgvU/principios_de_asepsia_y_antisepsia.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzaxepigi/idjjgjA/91784342176.pdfIn PDF document text
    • http://soul-felt.com/xitasugekanadukevina0l5gg.pdfIn PDF document text
    • http://aicberg.net/free_video_download_youtube_june_20164chy.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/dih1gg1/rocket_royale_game_online.pdfIn PDF document text
    • http://kisuvok.scienceontheweb.net/advanced_excel_2020_complete_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/lokemoxire/PhihihU/zuburuxapevi.pdfIn PDF document text
    • http://devgm.design/crossfit_wod_man_makersv6qdb.pdfIn PDF document text
    • https://cdn.sqhk.co/serodozire/OOjhihB/baby_lullaby_sleeping_songs_lyrics.pdfIn PDF document text
    • https://nolutoxut.weebly.com/uploads/1/3/4/6/134683805/pijar.pdfIn PDF document text
    • https://dajemegexiri.weebly.com/uploads/1/3/4/4/134492390/fd7862e3f7a0.pdfIn PDF document text
    • http://goodsun.fun/soxijiskasy.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/ba0beb87-9c59-4055-90ad-007749c0049f/modal_verb_exercises_online_advanced.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c750a54-ecd6-473e-8566-b15755d58eea/css_tutorial_free_download_for_beginners.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/24ee1571-2ae4-405c-a33d-27ca53cde9fd/26385044910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e84b3e28-6e84-4a3d-9bc0-6bfb11ab7c4e/what_is_a_quitclaim_deed_in_real_estate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c529793-da84-4b7b-b642-eea67eca77f8/the_secret_life_of_pets_1_full_movie_youtube.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_off0000fea7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEA7 5432 bytes
SHA-256: 8b5518b1b0d7119d5ad1abfbb4600f11654fc1e0eb86bcebd2c1d1b0e952f854
font_01_sfnt_off000110d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110D1 12328 bytes
SHA-256: 932eacda373d91b8cde51295ad9c92af23d4fafcfabdd5ead399235580441953

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