Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed5eb525453c3037…

MALICIOUS

PDF

118.4 KB Created: 2021-04-07 14:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 5b5676913c6c49400f082b3af5102600 SHA-1: a98aec1eb9ba4a32b6aafbce6cf03ec6fd5ac770 SHA-256: ed5eb525453c3037500105d965ba5ab18e142955128863f5be3652cc9b6abaec
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The document contains numerous embedded URLs, many of which are hosted on disposable domains or utilize UTM parameters, suggesting a phishing or redirection scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating a link farm designed for malicious purposes. No scripts were extracted, but the overall structure points to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9959

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://soxebez.ru/strik?utm_term=what+does+federal+limits+apply+on+a+virginia+driver%2527s+license+mean PDF link annotation
    • http://varuxof.22web.org/edits_for_free_windows.pdfIn PDF document text
    • http://luwogexejel.getenjoyment.net/2020_kpss_corafya_video_ders_notlar_benim_hocam_yaynlar.pdfIn PDF document text
    • http://womotov.22web.org/5557774197.pdfIn PDF document text
    • http://fusekimutoxi.sportsontheweb.net/my_little_pony_the_sims_game_download.pdfIn PDF document text
    • http://rijupoxog.22web.org/across_the_stars_sheet_music_flute.pdfIn PDF document text
    • http://kijekidajefi.getenjoyment.net/92147557713.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/29a66ebd-d146-4ea1-a0c2-a2f91cafa3cd/jilimosisosobu.pdfIn PDF document text
    • http://tivakifuzir.atwebpages.com/american_english_file_vk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bee5762c-50cf-4d5c-bb29-a33d73060d77/digitech_rp250_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/preparation_of_aspirin_lab_report.pdfIn PDF document text
    • http://jezopemezirixo.rf.gd/fuwuxikiwuve.pdfIn PDF document text
    • https://s3.amazonaws.com/firigugixujotov/kotolenasinuxijaremesi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17bc5cf2-6b07-408d-9a8d-7b8c3c91eb7e/lopep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7dea6518-7da3-446e-b4af-bc717eba545c/waxewegek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18c77357-fba6-4609-8be5-d64ff845ca23/84141826804.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/libajetolujafubabeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62f17544-689b-4e58-bf96-fd06bc7708a0/reactive_oxygen_species_review.pdfIn PDF document text
    • https://s3.amazonaws.com/silubebebefuju/what_size_tires_does_a_2007_ford_focus_take.pdfIn PDF document text
    • https://s3.amazonaws.com/sezebepit/dexovatefe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ea70d0f-dbea-4d36-82cf-c97d6eeae93e/comentario_biblico_moody_para_descargar_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/vesubodufisi/macbook_air_excel_spreadsheet.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/zesepaloremigotetow.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/26388740477.pdfIn PDF document text
    • http://fafanuzumamowaz.epizy.com/71955111390.pdfIn PDF document text
    • http://ligoroxenafof.atwebpages.com/mhw_leshen_quest_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dee57b39-4700-44c5-9dba-6459e4b1d092/26206911440.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17EBE 5568 bytes
SHA-256: 1cfaf6f0d7e5782f7d3abe61cee5c6b101d24c5f7c6d384f26dd93bb2dcdacec
font_01_sfnt_off000191a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x191A2 12744 bytes
SHA-256: a99c1ed3ebe8bbe83168d71bbf576578278d7cbb5602a2eef5d628254125225b
font_02_sfnt_off0001bc72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BC72 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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