Malicious PDF — malware analysis report

Static analysis result for SHA-256 fca38d8e7d6aa9b4…

MALICIOUS

PDF

46.2 KB Created: 2021-03-05 05:37:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 84e207f6bdab71c4a54a959ec028a3c2 SHA-1: 5ef5693b98cd717be3f94c942842f59340112cc0 SHA-256: fca38d8e7d6aa9b4f5c50ee927c03e96dc87c00ea234f1b203fba911cc980a0a
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs pointing to external domains, with heuristics indicating it functions as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of an attempt to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7951

Heuristics 4

  • 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 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://vilenefex.ru/award?keyword=right+triangle+trig+word+problems+worksheet+pdf PDF link annotation
    • http://openlait.pro/telezafegomuruxibipafuvalfv3fj.pdfIn PDF document text
    • http://instasale.company/to_do_list_printablenz2qj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366311/normal_5fe36a6df0a03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505699/normal_603603145d066.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_60403d8487c02.pdfIn PDF document text
    • http://epaytds.xyz/stealth_camera_app05g8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421627/normal_601f1ad6328d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376878/normal_5fd6e1a7e4841.pdfIn PDF document text
    • http://gratoraama.space/zevonamaku1a0ae.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/how_to_program_directv_remote_rc71_to_vizio_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afa89d0a-4c8e-4dea-ac1b-00929c84bc97/de_que_trata_la_obra_la_divina_comedia_de_dante_alighieri.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06eee41-9824-494c-9043-5777eba08e0b/75386732036.pdfIn PDF document text
    • https://d6504552-49b0-4b7d-b1ff-94f9e1082b83.filesusr.com/ugd/1f0558_4b8f3ace8b3843d0879d0ce825d8d1b5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jenisozazewubo/simple_powerpoint_templates_2007_free.pdfIn PDF document text
    • http://jerovewoxisabu.epizy.com/christmas_comprehension_worksheets_for_1st_grade.pdfIn PDF document text
    • https://7a48fde5-f9d1-4ce4-84a2-8b156d245d18.filesusr.com/ugd/8127dd_3ba8e6370c3748aa8d98b8bb4b985396.pdf?index=trueIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_190be9170a88443094785d63524bd3b0.pdf?index=trueIn PDF document text
    • http://bijamujijupife.epizy.com/what_is_field_sanitation_in_the_army.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18b42615-d972-4b86-a005-dd92e6ff6b84/zokani.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08d53b6e-8830-4b18-a56d-e660e9a0fa6b/3_main_design_principles_of_object-oriented_programming.pdfIn PDF document text
    • http://tedusulowo.rf.gd/bikajuwarumomaf.pdfIn PDF document text