Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2f0b2fcd836c32f…

MALICIOUS

PDF

83.1 KB Created: 2021-03-19 19:46:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a12be9d503fae8ebd66fb0c35a6a6f94 SHA-1: 1691f50f541863741e32e192fc9912d91a48a2b6 SHA-256: e2f0b2fcd836c32f03379aeb6ebcdcc2ee4ead4d7802a9529f6edaf32a3360d1
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 0.9994

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://kuzutuzo.ru/wix?keyword=police+academy+cadences+running PDF link annotation
    • https://cdn.sqhk.co/letarezetap/6hdigjb/calligraphy_fonts_free_marathi.pdfIn PDF document text
    • https://cdn.sqhk.co/daxerarugak/gVigGge/walamesojusibozokadu.pdfIn PDF document text
    • https://cdn.sqhk.co/nupozifulija/6FBjd6z/demuzibejujebupeme.pdfIn PDF document text
    • http://kekemubitaf.iblogger.org/the_sorcerers_apprentice_movie_song_mp3_download.pdfIn PDF document text
    • https://cdn.sqhk.co/joninopi/tqBiiXv/guardian_tales_lazy_fairy_world_2.pdfIn PDF document text
    • https://cdn.sqhk.co/ratijojitud/5jdYqZy/34730634490.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/hebQ5gg/gupuruwi.pdfIn PDF document text
    • http://xozukasel.iblogger.org/kilafelufoxagenupavus.pdfIn PDF document text
    • https://cdn.sqhk.co/zafilivopupu/hjNhf4B/toyota_auris_touring_sport_hybrid_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rotikozezusigis.rf.gd/30036794746.pdfIn PDF document text
    • https://s3.amazonaws.com/naxizugenabi/kifododegelezelisubobu.pdfIn PDF document text
    • http://wafijolosa.epizy.com/cantona_puebla.pdfIn PDF document text
    • http://lekinip.epizy.com/avery_labels_template_for_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/babetafaperaxov/ils_ont_fait_l_histoire_bd.pdfIn PDF document text
    • https://s3.amazonaws.com/vanatul/logarithm_worksheet_1_answer_key.pdfIn PDF document text
    • http://jubadoloje.epizy.com/fivetekajide.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/2001_dodge_ram_1500_parts_catalog.pdfIn PDF document text
    • http://susesibukof.epizy.com/video_player_apk_free_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/wixanarer/donald_barthelme_the_school_1974.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/auricular_acupuncture_book.pdfIn PDF document text
    • http://rilimopukalus.rf.gd/vowels_and_consonants_list.pdfIn PDF document text
    • https://s3.amazonaws.com/dozore/articulos_cientificos_de_biologia_celular.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/bcbs_of_texas_provider_manual_2019.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_off00010818.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10818 5360 bytes
SHA-256: 4ed6c679aa6c5a344fb000e67f50cbff149f0573292108c1327076b5e0d443e6
font_01_sfnt_off00011a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A49 10840 bytes
SHA-256: 18983e0b251c5b6fe22ddd4ae273358ee2f3a21b52210ab0a32699099e65201a

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