Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7fb483ac53ecc3…

MALICIOUS

PDF

75.2 KB Created: 2021-03-13 18:11:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 451fbb9c08b7209573224c0e35903b58 SHA-1: 3f891d3fb3f83864f10fb4be4d99e1a7173d052f SHA-256: 1f7fb483ac53ecc3a49c0ea62bae54b3570a22bd227ac42eda775bed6bcedb90
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The embedded URLs, particularly 'https://vilenefex.ru/award?keyword=payment+of+gratuity+act+pdf', suggest a phishing or redirection attempt. The document's content and structure are consistent with a lure to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/award?keyword=payment+of+gratuity+act+pdf PDF link annotation
    • http://tifoxikutawe.sportsontheweb.net/95216711658.pdfIn PDF document text
    • http://zunuruxeguxifi.mygamesonline.org/1000_places_to_see_before_you_die_united_states_checklist.pdfIn PDF document text
    • http://wasatosu.sportsontheweb.net/27301366059.pdfIn PDF document text
    • http://vurejowug.mypressonline.com/excel_vba_find_last_row_in_selected_range.pdfIn PDF document text
    • http://xuzerujagojagip.scienceontheweb.net/18575025570.pdfIn PDF document text
    • http://madoxorijegobe.sportsontheweb.net/is_4th_generation_echo_dot_better.pdfIn PDF document text
    • http://negedibomul.sportsontheweb.net/spy_tec_mini_portable_real_time_gps_tracker_reviews.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tifavamifikas.myartsonline.com/eureka_boss_smartvac_4870_bags.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab2f8fd3-4cf7-4923-95b6-849177ab1029/zotukepuxu.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/sony_bravia_32_inch_smart_tv_price_in_kenya.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d87b2ec9-3fa1-4a4e-bf19-24ceb93de403/distributive_property_of_multiplication_worksheets_7th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fd0a592-a280-4f45-9b22-30457fceeeb0/bose_sounddock_ii_lightning_adapter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/312aa92c-8b4b-435f-a56c-c1226f08c4f4/golds_gym_exercise_bike_300_ci.pdfIn PDF document text
    • http://pivimufe.atwebpages.com/what_are_the_social_problems_of_indian_society.pdfIn PDF document text
    • http://favukimasinete.rf.gd/combining_like_terms_puzzle_worksheet.pdfIn PDF document text
    • http://kafopazam.epizy.com/igcse_biology_notes_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcd4ef77-b34c-45e5-b8ef-040b5aed6d51/insinkerator_badger_100_installation.pdfIn PDF document text
    • https://bit.ly/2GbLf8sIn 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_off0000eafd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFD 5368 bytes
SHA-256: f7b2e62091119e84c30e68d906ce23e7ed52f980c504b54b5a073039c68ecc26
font_01_sfnt_off0000fd3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3D 10236 bytes
SHA-256: 834adb9c4e7e5c6dcf53812707927ff92c6f58f0aca8c485c18057cdc23a05fd

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