Malicious PDF — malware analysis report

Static analysis result for SHA-256 5acef0fff38a49dc…

MALICIOUS

PDF

81.3 KB Created: 2021-03-22 13:30:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28
MD5: bf9b3f458d4be7c3802bfabe83bf8b08 SHA-1: 452f14c9166eb490b72647bdf553732cd84040f3 SHA-256: 5acef0fff38a49dca4315ff4cc9ddfa3db09b9e8842e65c26bca3237b8da5002
126 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting an attempt to redirect users to malicious sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using numerous distinct hosts for redirection, a common tactic in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://resalured.ru/wix?keyword=monster+house+parents+guide PDF link annotation
    • http://riwotivadejud.sportsontheweb.net/honda_5_wire_o2_sensor_wiring_diagram.pdfIn PDF document text
    • http://fusobilel.iblogger.org/92618920296.pdfIn PDF document text
    • http://xodaxedepapopox.mygamesonline.org/assignment_problem_hungarian_method_maximization.pdfIn PDF document text
    • http://witotikumuw.22web.org/xudukeweruvavuberajo.pdfIn PDF document text
    • https://cdn.sqhk.co/kupuruvew/Bhf5uie/49330569639.pdfIn PDF document text
    • http://zugapuvu.mywebcommunity.org/data_mining_clustering_techniques.pdfIn PDF document text
    • http://vomidujoma.scienceontheweb.net/bangladesh_map_hd.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/LichbeN/one_color_png_background.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
    • http://lawesiwewif.onlinewebshop.net/7079503709.pdfIn PDF document text
    • http://bogurivesinoni.rf.gd/wopovusu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/617a5853-04d9-4c04-bef1-85cdfd71af1a/komuxedirokafesab.pdfIn PDF document text
    • http://kuxomexepus.epizy.com/delopitudofuvizijapir.pdfIn PDF document text
    • http://feliruxitekul.epizy.com/81135599470.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2255c57c-af0a-4e3f-b2c7-c905b4ad6b6d/59001027641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd886cae-5aff-4251-be0f-00f1b49286f1/67507122145.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4c72ab7c-66e4-4d4d-add2-e7479d0a89ea/muvadaluxosijuw.pdfIn PDF document text
    • https://s3.amazonaws.com/divikufifir/sifufeguxumujirewozeru.pdfIn PDF document text
    • http://suzufesa.epizy.com/aikido_hand_techniques.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/alpha_omega_elite_car_seat_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67ba6eca-6851-45ae-bf39-f1354eb5be34/63496932461.pdfIn PDF document text
    • http://pomigipasa.epizy.com/dolphin_emulator_apk_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/wujafivabipo/mejekazimozesajakobo.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_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 5076 bytes
SHA-256: b82190bca94e41ff267858d99bad8ae9becf14aad954a50bf8784f65b2402ed3
font_01_sfnt_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 10012 bytes
SHA-256: 24b3aa772f8cd3696b5098c1bde5a09b1fe8b1256d8f3efbde46768681c3920f
font_02_sfnt_off000129a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129A2 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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