Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1de6d96c6d25ee7…

MALICIOUS

PDF

68.9 KB Created: 2021-04-12 00:05:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 7c8245caa206b163760ae04c49ab05b0 SHA-1: e8144ba641ade2198121ad8f43973358fa96d0af SHA-256: a1de6d96c6d25ee7cc6e2af056588b9412f021905b174058102e7f79b818405f
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ML classification and ClamAV, indicating malicious intent. It contains numerous external links, with a significant number pointing to potentially malicious domains, suggesting a link farm or phishing lure. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the document is designed to redirect users to external sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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 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://kuzutuzo.ru/strik?utm_term=2nd+grade+math+curriculum+nc PDF link annotation
    • http://juzufezike.mygamesonline.org/barreras_y_puentes_de_la_comunicacion.pdfIn PDF document text
    • http://mezeferatitora.scienceontheweb.net/11864763055.pdfIn PDF document text
    • https://dazujaxika.weebly.com/uploads/1/3/1/4/131437396/1146155.pdfIn PDF document text
    • http://dapisamifo.22web.org/manualidades_con_botellas_plsticas_de_gaseosa.pdfIn PDF document text
    • https://wavajonenavu.weebly.com/uploads/1/3/1/8/131871509/lenaxitir.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/gujedalobezuxos.pdfIn PDF document text
    • https://zojivevu.weebly.com/uploads/1/3/6/0/136090852/0e2c801b43.pdfIn PDF document text
    • https://pinagoremomaj.weebly.com/uploads/1/3/0/7/130738806/zapeweziditedemerene.pdfIn PDF document text
    • http://sifisomatexow.sportsontheweb.net/52317107193.pdfIn PDF document text
    • https://tulidakavixesa.weebly.com/uploads/1/3/5/3/135347336/105366a7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/dd_5e_campaigns.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/nigobasibevo.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/indium_solder_wire_datasheet.pdfIn PDF document text
    • https://s3.amazonaws.com/midipes/fusigijadovipen.pdfIn PDF document text
    • https://s3.amazonaws.com/fajujiju/68346493430.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2239658b-241f-45c0-88fa-b93532b8d8e7/reweboforidoveso.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/how_to_insert_symbols_in_google_docs_on_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/lamborghini_song_free_pagalworld.pdfIn PDF document text
    • http://faluzarawajuxos.epizy.com/mefez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb116a57-a961-4d7d-98ef-341038cc0f90/86748098351.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ced2b03d-8715-4944-a431-40d9ec07900c/simplifying_square_roots_worksheet_answers_with_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d245722-2d6a-4dad-ae60-99b604474657/how_to_find_speed_of_roller_coaster_at_different_points.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27ca5668-0bd4-4340-9c17-06bf39a4913a/girl_with_the_dragon_tattoo_2011_soundtrack.pdfIn PDF document text
    • https://s3.amazonaws.com/zulezov/danutipe.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_off0000d0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0E3 5212 bytes
SHA-256: 7fadb2568a383c79820c5290fa7e11169c0995592b15e875484dadaabb95c7ec
font_01_sfnt_off0000e272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE272 10604 bytes
SHA-256: 883ff50bc3f9d5dd2d54e4ca749f372c5973efe6e6ffb4f29816adb8ab0deb94