Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d094f25cb3df48b…

MALICIOUS

PDF

71.0 KB Created: 2021-06-08 08:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 9f58161614cddd059ea696b16b16ce44 SHA-1: 962062285a7985da1e7bbc44b96168e45e0d4a21 SHA-256: 8d094f25cb3df48b574871e9adec97c4ab11f9836938253ee8dacf2b155b42fd
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, with one pointing to 'huntic.ru', suggesting an attempt to redirect the user to a malicious site. The document body, though heavily obfuscated, appears to contain keywords related to computer hardware, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 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
  • 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://huntic.ru/pbw?utm_term=hp+elitedesk+800+g4+65w+desktop+mini+pc+specs PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4369765/normal_6058bc5d04f43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_60683375b9e07.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/75d389e2-a386-4b0a-a944-42364fbdceca/bukebogalebipujibo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d49ea80d-5bfe-4c34-ae2e-2bb5021e328a/what_are_the_types_of_report_writing.pdfIn PDF document text
    • http://gexufak.pbworks.com/w/file/fetch/144550200/toca_boo_unblocked.pdfIn PDF document text
    • http://pajinap.pbworks.com/w/file/fetch/144499977/how_to_get_a_modded_account_on_gta_5_xbox_one_for_free.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/17072325731.pdfIn PDF document text
    • http://kivupored.pbworks.com/w/file/fetch/144717387/4423866670.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/62a5e866-e006-49a4-a0a5-643f7066009a/how_he_loves_chords_easy.pdfIn PDF document text
    • http://vikowezanipe.pbworks.com/f/extremely_loud_and_incredibly_close_quotes_grandfather.pdfIn PDF document text
    • http://morabef.pbworks.com/f/carta_para_felicitar_a_mi_novia_en_su_cumpleaos.pdfIn PDF document text
    • http://jukozatixul.pbworks.com/f/sample_email_requesting_information_from_client.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/w/file/fetch/144420909/zuxilat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8654322d-1df4-496c-9788-b3d4d1f2af84/vodika.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a762afb1-3dbc-4a4e-bce5-05f169cce471/sample_safety_interview_questions_for_research_assistant.pdfIn PDF document text
    • http://poxanoralanu.pbworks.com/w/file/fetch/144634209/kumelidudimodi.pdfIn PDF document text
    • http://gosirata.pbworks.com/w/file/fetch/144455433/jipagurow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e5afd90-4b61-4fe8-90e3-c608babf51a7/what_are_the_functions_of_accessory_pigments.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d758bcff-ddda-4f0e-9319-95c0f51f7e38/how_to_use_advent_candles_at_home.pdfIn PDF document text
    • http://fepewuwakow.pbworks.com/f/american_heart_association_acls_pretest_answers_2015.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_off0000d6b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B2 5908 bytes
SHA-256: f5b5a4d2ba5d8ea2bdde74c63607960c613268ebb71c065ab5d1bb5276400bb9
font_01_sfnt_off0000eae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE0 10504 bytes
SHA-256: c2517a7b28c8552e4f60d03332ee43c31267b0ab0a662a44fc64ffb7ad9863b7

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