Malicious PDF — malware analysis report

Static analysis result for SHA-256 4012a0480d3fd1e3…

MALICIOUS

PDF

95.9 KB Created: 2021-05-15 12:36:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 7ed06e098888a5e1c6c2591019336639 SHA-1: 0504b74e338466bb06835c341091725c68b78308 SHA-256: 4012a0480d3fd1e3b75ebcb19063a368b9829d68dbe6794c75f464bc17e03084
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an embedded URI pointing to 'fokemale.ru', which is likely part of a phishing campaign. The document body, though heavily obfuscated, suggests a lure related to official forms, aligning with social engineering tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://fokemale.ru/strik?utm_term=formulario+declaracion+de+bienes+y+rentas+funcion+publica+persona+natural PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4499660/normal_604ca675a3a46.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/gjQhijg/top_popular_ringtones_2020_free_download_pagalworld.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471273/normal_6044d98a9715f.pdfIn PDF document text
    • https://cdn.sqhk.co/zikufivol/cxipyij/wedding_hair_and_makeup_artist_melbourne.pdfIn PDF document text
    • http://jixewelo.scienceontheweb.net/g_body_steering_box_upgrade.pdfIn PDF document text
    • https://cdn.sqhk.co/bojojiweg/l1ihEge/new_cyberpunk_2077_countdown_gameplay_trailer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4403688/normal_60086fdb7033b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501229/normal_5fcba2925f19c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486548/normal_602e981fee2b7.pdfIn PDF document text
    • https://cdn.sqhk.co/tumufiwusifo/gqhe4ij/fish_and_chips_game_online.pdfIn PDF document text
    • http://risonubokedoxav.scienceontheweb.net/coordinate_geometry_a_level_notes.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/92d7b012-405e-4a38-834e-4e19056a0694/ink_cartridge_for_dell_v313_printer.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/74668508845.pdfIn PDF document text
    • http://nuruden.rf.gd/48488749680.pdfIn PDF document text
    • http://zowonotetejubi.rf.gd/oraciones_para_la_boveda_espiritual.pdfIn PDF document text
    • https://s3.amazonaws.com/wuxupewu/jlab_jbuds_air_sport_true_wireless_review.pdfIn PDF document text
    • http://kedipijelabilum.rf.gd/zuxevogudafuwof.pdfIn PDF document text
    • https://s3.amazonaws.com/fusidejebi/bagatiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b9260d3-4417-4fb7-9351-340ecf61bfe8/parrot_bluetooth_mki9200_user_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf727734-08f8-4c35-94a6-3fe67d8c0e61/how_to_connect_logitech_k400_plus.pdfIn PDF document text
    • http://vawinujofupin.myartsonline.com/rig_yajur_sama_atharva_vedas_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7b6b7d1d-d449-49c3-8908-7e04339a507d/marasixit.pdfIn PDF document text
    • http://ruxurosagogaru.epizy.com/frigidaire_washer_dryer_combo_not_drying.pdfIn PDF document text
    • http://nezugetojuf.myartsonline.com/canales_de_comunicacion_marketing.pdfIn PDF document text
    • http://vedisupekak.epizy.com/how_to_work_out_net_profit_business_studies.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_off00013278.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13278 5496 bytes
SHA-256: 495c32f8b9b7f52d9fdc70c71e56e45e483578ac393909e23c0afdb44ed317d1
font_01_sfnt_off00014515.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14515 13244 bytes
SHA-256: e851e661cecd525937b1210353dafe309be832838c2f0b7797a1bd8644425700