Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e0667734759ec7d…

MALICIOUS

PDF

76.5 KB Created: 2021-05-30 09:17:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 1764258257f0c7e8efe9510e06d954f1 SHA-1: 860c3506a440f4de2fd6fffb64db7646da554707 SHA-256: 3e0667734759ec7dee49cd0515f0d2e6b1b4e4401e8c2d18a2707acae5e8b378
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://golowaki.ru/strik?utm_term=yin+robert+k+1994+case+study+research+design+and+methods+%25282nd+ed.%2529 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366632/normal_606693b174148.pdfIn PDF document text
    • https://sexedevojaboto.weebly.com/uploads/1/3/2/6/132695366/3042797.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418567/normal_606b7441050be.pdfIn PDF document text
    • https://minileponefij.weebly.com/uploads/1/3/1/0/131070526/foliperiwaruza.pdfIn PDF document text
    • https://ruwixotuso.weebly.com/uploads/1/3/4/1/134131383/rutojatutepowebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409122/normal_600d5ee46ceca.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/d4a66376-fd3f-43b1-a004-42430a60a777/el_arte_de_amar_pelicula_completa_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28b2608e-3227-4bf2-a791-963620b0c1b2/myanmar_grade_10_biology_textbook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e43f3e1-a9cb-40ef-a7c2-10daa9c280b7/napasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1dc3f8db-41bd-43ad-9eec-5c5103635be6/onkyo_tx-nr515_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aaa9f07d-0e28-4f42-8253-14aa618720f7/88296575980.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d93b763-5543-43bc-93eb-7cc954833727/marvel_movies_in_order_before_avengers_endgame.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cc566db-00d2-4a1d-98d4-a71a2c93d789/bezewuxefepawiribode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d3784ca-4efa-49f6-bbdf-bc10fecc3acf/lavedudovigodoxojoguja.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eadd2627-4393-473e-84bc-f914e0f1f681/las_bicicletas_son_para_el_verano_summary_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e8244f1-3b5b-433a-acda-a37631d9cc9f/32688712200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c344a8d-ed90-44a3-9aa2-e5f1545a7f75/how_to_start_hamilton_beach_flexbrew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a89b90d3-a5d1-497b-921e-c84c12bcbab3/24364736500.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/916360ee-7ecb-4cda-b29b-9abab59edfcf/american_gods_season_2_characters_explained.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71f5da54-ffde-406c-a69f-de3a28de5948/what_kind_of_degree_does_a_vet_tech_need.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab3b1717-b399-47b0-a2b3-145b7ca3879a/private_bank_job_interview_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3963467-1c7f-4a9f-a33f-0080eebc12f1/what_drink_at_dunkin_donuts_has_the_most_caffeine.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_off0000eaa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA3 6204 bytes
SHA-256: 3cbe016ca0eb2072e40daffcdd418b4267cbe2c2b44efe34698b569ea00ef648
font_01_sfnt_off0000ffba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBA 10672 bytes
SHA-256: 52aeae93a41c9006ba4e949bd53b42bbae13236862a8558e6ab1f48a42aac2ac