Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a76c106d2506200…

MALICIOUS

PDF

81.7 KB Created: 2021-05-28 19:30:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: afb807c42b9503c3076ea599bfe18c91 SHA-1: d58424ce4492a9dbdba3dc05f8078ec39c43ac5e SHA-256: 0a76c106d25062000496cfc8bdc6b0047e91c6ce07b9badc9b645765282242eb
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crophysi.ru/strik?utm_term=what+does+white+birthmark+mean PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4474989/normal_6065df300fa71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421943/normal_5ff25a9d162e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407102/normal_5feb866980ec7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500692/normal_604000bd6a5fd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476002/normal_5ffda6e0a463c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472198/normal_5fe1909d22ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444866/normal_6051fa8559ef8.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/ad3abdf2-6817-404a-bb93-347b727d7955/5713594270.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d607a66a-3d66-43f6-95bc-017a87c9fa85/examen_proporcionalidad_y_porcentajes_2o_eso.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e710db83-c4a7-484f-8f0c-94ade7e5a6e3/what_is_management_accounting_information_system.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3ee5f0ff-874e-45c4-8743-a97573c70938/what_is_an_example_of_satire_in_harrison_bergeron.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e238f383-0f6e-438f-8ae6-ad64a5b0aeda/71760626449.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e96d66b-04f9-40ec-97e6-05e1b0c89fca/asana_project_management_software_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4435d411-83a5-438d-83b7-9c3d5015f86d/69359264741.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/989713d8-c443-43e3-989f-a0dcb8b218fb/primeros_auxilios_psicologicos_5_pasos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5676b508-a516-416e-9781-ab79053b8d26/lewosafoneburuxaxivu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02599b59-d009-48e6-9295-2272a0d63466/lamuvuxuxafojasinon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0e860a4-047a-45dd-a107-15ab6770c089/silence_of_the_lambs_sequel_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b97f9dcc-f74f-4244-a0f8-7f76af9ac883/us_navy_regulations_1990_article_1165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df39225c-6a08-4b45-8b2a-348b00911e9f/who_murdered_ben_in_defending_jacob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0954f915-5976-45ea-b1f5-e153e054be98/94557582000.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9afcec1a-c874-48c7-ab98-dc7b3ee95d9f/80682945200.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2023d677-71fc-4de0-b475-d8332bfdf3d5/94498971125.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710a7bdc-3ab4-4833-a3a5-df89ba5d3c3d/insinkerator_hot_water_tap_instructions.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_off00010373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10373 5340 bytes
SHA-256: 84d17d9f66f86c65e383a8f339de75aca6b713c1c6dc63926f4b88031d2cf301
font_01_sfnt_off00011588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11588 10592 bytes
SHA-256: 4f71134d1cd7b44a505d133aba04984b7ea3f5c8b1b3114de1d5198275431c27