Malicious PDF — malware analysis report

Static analysis result for SHA-256 74abadc781a571e1…

MALICIOUS

PDF

72.3 KB Created: 2021-03-22 04:49:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 89955e8372b1cc55f4d7afbd9fd07ae1 SHA-1: 1c9be0b9e4d8aa1bce8ba003d158b80ec91ee889 SHA-256: 74abadc781a571e17cb9c7620d4d1bc98b20187bef2c2669f524b3cfc1df6338
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many pointing to disposable domains, and is described as a link farm. While no scripts were directly extracted, the presence of PDF_URI and PDF_SEO_DISPOSABLE_LINK_FARM heuristics suggests the document's primary function is to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://dugedepap.ru/123?utm_term=vba+macro+goto+sheet PDF link annotation
    • https://cdn.sqhk.co/nojebimit/jgQTrLo/95970170220.pdfIn PDF document text
    • https://cdn.sqhk.co/rizonozugaj/higcJof/37511431012.pdfIn PDF document text
    • https://cdn.sqhk.co/lojosexotak/hgF2Siw/risk_analysis_template_excel.pdfIn PDF document text
    • https://cdn.sqhk.co/vipabure/KCeiegd/43711771138.pdfIn PDF document text
    • http://fopokigife.mywebcommunity.org/kinavofawamuvowesuw.pdfIn PDF document text
    • http://jejunobu.iblogger.org/filasukerebizem.pdfIn PDF document text
    • https://cdn.sqhk.co/zufuxirap/7fyhemw/50187544197.pdfIn PDF document text
    • http://vixemifojetinag.sportsontheweb.net/crack_the_pm_interview_download_free.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/39f45882-48ac-40e6-ae49-94c1954e3b72/webipufan.pdfIn PDF document text
    • https://s3.amazonaws.com/vosimalume/context_clues_worksheets_10th_grade.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e45253c-2b04-4d4a-8447-f2075ba6af10/85649267544.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ad44a89-1c75-4590-85c4-9fedb83e114b/hopper_duo_vs_hopper_sling.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/sezerowutefaturojej.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/singapore_red_cross_first_aid_refresher_course.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580dd00e-fb97-417a-a2eb-5031d0094e86/walokaxofu.pdfIn PDF document text
    • http://zewixezix.epizy.com/50651999698.pdfIn PDF document text
    • http://fuguzametekobo.myartsonline.com/sownik_angielski.pdfIn PDF document text
    • https://s3.amazonaws.com/jiwisi/58493142162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3c0b65f-0139-4482-860f-89087652f071/physiology_book_for_mbbs_1st_year.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_off0000ddb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB0 5288 bytes
SHA-256: fb8dde841e44e299ecd83b770ab47cebd22fe61aa72faeff3b7433d5f88bebdb
font_01_sfnt_off0000ef85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF85 10784 bytes
SHA-256: 06b1cdb72dd643dc3437ba06ebefb4c80887bd36787feeb13a98171542786789

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