Malicious PDF — malware analysis report

Static analysis result for SHA-256 4698dcf4440f4bae…

MALICIOUS

PDF

75.1 KB Created: 2021-06-11 08:00:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 551a4abf22ed5f3538cd97b0145c7f76 SHA-1: 24ec443d7f588b99c35f65d2a1f7989525bed86a SHA-256: 4698dcf4440f4bae8974bfc443aa6c923a2148b4984e8199d4d880a1f72a9c12
186 Risk Score

Malware Insights

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

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 0.9960

Heuristics 6

  • 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 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.
  • 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://inwebjor.ru/pbw?utm_term=mapa+mundi+hd+pdf PDF link annotation
    • https://ludexibof.weebly.com/uploads/1/3/4/6/134638297/8732108.pdfIn PDF document text
    • https://duwujesipegon.weebly.com/uploads/1/3/4/8/134883919/furofiselokagogal.pdfIn PDF document text
    • https://retedavaliloxi.weebly.com/uploads/1/3/5/3/135393755/lajuwijasazozogerano.pdfIn PDF document text
    • https://litudawugo.weebly.com/uploads/1/3/3/9/133997631/1886788.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://taxexuwej.pbworks.com/f/didariwubodiloreretib.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18e6cc0c-338b-4bae-bb2c-0a2af534887b/does_iphone_12_pro_have_nfc_reader.pdfIn PDF document text
    • http://mizunebapod.pbworks.com/f/shadowrun_5e_fillable_character_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a20ce27d-237f-4584-a6f4-c747de77ebaf/vavisuxojog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39ea4523-b897-4349-8f41-f2badca7da92/32645122578.pdfIn PDF document text
    • http://liwuvedesisu.pbworks.com/w/file/fetch/145045737/monster_legend_mod_money.pdfIn PDF document text
    • http://kufavuva.pbworks.com/f/koffi_olomide_ft_diamond_mp3_download.pdfIn PDF document text
    • http://sujagajo.pbworks.com/w/file/fetch/144524904/baahubali_telugu_mp3_songs_download_sensongs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/852e4aaf-dc37-44d4-adce-3829cabbfef0/foodsaver_v2490_problems.pdfIn PDF document text
    • http://luwapoveduvi.pbworks.com/w/file/fetch/144526437/how_to_fill_punjab_police_constable_form.pdfIn PDF document text
    • http://detomipipu.pbworks.com/f/knitted_garment_manufacturing_process_flow_chart.pdfIn PDF document text
    • http://tazijebep.pbworks.com/f/jowokunamiv.pdfIn PDF document text
    • http://mikabipi.pbworks.com/f/92182183800.pdfIn PDF document text
    • http://metudebebi.pbworks.com/w/file/fetch/144873042/95052656198.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28f1971e-726b-49d1-8d71-61be4e14680f/sketchup_make_vs_pro_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c158b89-a77f-4b33-aa9f-42207115b943/kojimanitowugunegovabe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdaf6168-9b18-4c14-9fb9-54eb768e5864/15102511197.pdfIn PDF document text
    • http://gudotoxej.pbworks.com/f/why_does_my_dolce_gusto_leak.pdfIn PDF document text
    • http://tirotibixup.pbworks.com/f/menad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7005225f-5c85-4645-885d-86a72870ea19/quadratic_equation_exercises_with_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6efef4c2-56c5-4865-b413-ffbac38a1c16/15743730166.pdfIn PDF document text
    • http://memofemovo.pbworks.com/f/ladabosemeduwiwo.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_off0000e8e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8E1 4980 bytes
SHA-256: 61932b35addfd4319e5fa4951fead165df722b367c950bc7b5be599ce77c004a
font_01_sfnt_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 11432 bytes
SHA-256: 98df6ac754cd515b4c9a7a18d789e3af5c044e13fbd78415898758fcac36cf7f