Malicious PDF — malware analysis report

Static analysis result for SHA-256 6daf0b5657c628e7…

MALICIOUS

PDF

81.3 KB Created: 2021-03-19 03:51:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 05f3ccadfa1ba5ba6ca9ff27d1001743 SHA-1: 405f3c636be701810ae8ba013758425e0c3f1f45 SHA-256: 6daf0b5657c628e779dfa9755893646d1e21ac99086ac18fb6fed1ec5d123c2b
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning classifier and ClamAV, indicating malicious content. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm or phishing attempt. The presence of external URIs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic strongly indicate an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://mezovuduw.ru/wix?keyword=banjo+kazooie+click+clock+wood+enemies PDF link annotation
    • http://tiluvopira.medianewsonline.com/cavity_preparation_in_primary_teeth.pdfIn PDF document text
    • http://zereteleriw.getenjoyment.net/89915968432.pdfIn PDF document text
    • http://lalikexitaxixix.getenjoyment.net/free_nitda_scholarship_aptitude_test_questions.pdfIn PDF document text
    • https://soxawanijisal.weebly.com/uploads/1/3/4/5/134513704/2338496.pdfIn PDF document text
    • https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/ba12945.pdfIn PDF document text
    • http://milesnires.xyz/best_electrical_engineering_booksuihcb.pdfIn PDF document text
    • http://car-den.ru/is_law_school_worth_it_australianik24.pdfIn PDF document text
    • https://kafuribawixunav.weebly.com/uploads/1/3/4/8/134897544/momanasojapovewipi.pdfIn PDF document text
    • http://somixewavado.sportsontheweb.net/52375963634.pdfIn PDF document text
    • http://skidki-day.shop/kekojoviwivuc4rtq.pdfIn PDF document text
    • https://tebukebodo.weebly.com/uploads/1/3/1/3/131381901/vifalev.pdfIn PDF document text
    • http://vijepuwobewi.mygamesonline.org/gold_star_chili_menu.pdfIn PDF document text
    • http://tamawasobo.sportsontheweb.net/52149680253.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/311a80a7-9dc5-467e-b881-57911e85c560/motivational_interviewing_education_intervention_for_nurses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eed6865f-36ef-48ea-961d-d9b1809f6071/do_tv_writers_make_a_lot_of_money.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6143b53e-a77a-473b-844b-2376dfae26eb/nc_drivers_education_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/add9280b-6ddc-41df-8556-949586a8e341/47393562729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0bdeccea-5878-4f2d-940e-041149f4ef07/percy_jackson_the_lightning_thief_characters.pdfIn PDF document text
    • http://filosoko.onlinewebshop.net/72645011057.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/910cbb34-f85f-42cd-be53-dbb8cb5dfbd2/el_diario_de_greg_3_pelicula_completa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98640104-2a38-48e5-96a8-e44c9cd3bb74/vicks_humidifier_infants_safe.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_off0000f1a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1A8 4344 bytes
SHA-256: 4b6a6b8fd22e02b7b009c2ff11b192c04e78eb00b236819d87d391d74f93819d
font_01_sfnt_off00010102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10102 5320 bytes
SHA-256: 1c3010283a1cb51642f7d40461da26ab112e5b7036a8a4f3c5e2f2ca99da2ada
font_02_sfnt_off0001132e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1132E 10476 bytes
SHA-256: 29c659358e7963d05f7d706476fcf6ca1739eb81d7a7dff348b75d86eafd7994

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