Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7bbc8ac18f498ab…

MALICIOUS

PDF

65.1 KB Created: 2021-03-18 11:02:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 717da9fe5a533bc5c5ada9729a26ec12 SHA-1: 42d0916946dc905f5f4c4a9660573f3f242a6b67 SHA-256: a7bbc8ac18f498ab1d2b61f2075eb68ea8e470beff4b6d096d0663aefe757cef
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a large number of external links, many of which point to disposable hosting services, suggesting a link farm or phishing campaign. The primary malicious URL identified is https://midufefew.ru/award?keyword=isabel+allende+livro+paula+pdf, which is likely used to redirect users to malicious content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7139

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.
  • 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
  • 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://midufefew.ru/award?keyword=isabel+allende+livro+paula+pdf PDF link annotation
    • https://zabagazepag.weebly.com/uploads/1/3/4/4/134498959/1280513.pdfIn PDF document text
    • https://jomezafivawig.weebly.com/uploads/1/3/1/8/131856232/77713f8c381.pdfIn PDF document text
    • https://besuxape.weebly.com/uploads/1/3/4/3/134374749/3999554.pdfIn PDF document text
    • https://nebuxegakox.weebly.com/uploads/1/3/4/4/134404726/vogabuserupira.pdfIn PDF document text
    • http://mifetuvoge.22web.org/falesubado.pdfIn PDF document text
    • https://mogopefisumiba.weebly.com/uploads/1/3/5/2/135295831/8454147.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5933f891-7f87-413a-9aec-6f880e482ecf/rowe_ami_jukebox_amplifier_repair.pdfIn PDF document text
    • https://s3.amazonaws.com/lorifawuvawot/xuvurukafipavudizaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c821cfb2-5280-452a-9336-14a055e64a67/72764830861.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/563053b2-8625-4334-9e66-0d892a88bde0/casio_protrek_prw_3000_band.pdfIn PDF document text
    • https://s3.amazonaws.com/mulerux/vidmate_for_pc_windows_7_softonic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e0ab33b-f39c-4e9f-a6e1-2ec6a4b1869b/41037773690.pdfIn PDF document text
    • https://s3.amazonaws.com/fakuguvil/penubepoterogafu.pdfIn PDF document text
    • http://geworikirabud.epizy.com/the_bronze_bow_audiobook_chapter_3.pdfIn PDF document text
    • http://jarexuvi.epizy.com/bottleneck_layer_performance.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8573d37c-1f2c-4a61-81c4-19dd736c8a95/can_us_citizens_work_in_colombia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3219b52b-f521-4873-a2ac-bee1055d198f/26024736269.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/155427d0-9362-4ce9-b431-39d72990fe88/lexus_rx_350_f_sport_for_sale_nj.pdfIn PDF document text
    • http://pujigiberaxu.epizy.com/craftsman_lt2000_mower_deck_parts_list.pdfIn PDF document text