Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6f97a075bcf416…

MALICIOUS

PDF

84.8 KB Created: 2021-06-01 15:48:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d020a52d75f84ede9200b0b066092b5b SHA-1: 25831d881afed630c7eb49ae1b23d47a67cd35e5 SHA-256: 9a6f97a075bcf416770079ca639de60b2d5c57a913b3a0d29df10a83f7d4229e
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. The primary malicious URL, https://drafthe.ru/pbw, is associated with a phishing lure related to a 'contrato de anticretico bolivia pdf'. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://drafthe.ru/pbw?utm_term=contrato+de+anticretico+bolivia+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366357/normal_60281f0fc90dc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369633/normal_600174f19f541.pdfIn PDF document text
    • https://mawakizuk.weebly.com/uploads/1/3/0/7/130775730/1328094282e5dd.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4420034/normal_60b3130d84e00.pdfIn PDF document text
    • https://zajebujop.weebly.com/uploads/1/3/4/9/134902249/5471982.pdfIn PDF document text
    • https://mogisitubetaw.weebly.com/uploads/1/3/4/4/134496388/tavowizito.pdfIn PDF document text
    • https://vefotufujipewux.weebly.com/uploads/1/3/4/4/134401009/renuzigag.pdfIn PDF document text
    • https://muragifenujokuf.weebly.com/uploads/1/3/1/1/131164382/rerifikobeg.pdfIn PDF document text
    • https://tamilazubi.weebly.com/uploads/1/3/4/6/134604156/wipazemidine-fikodikirikesib-garaga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://pokuwatosat.pbworks.com/f/12535408080.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25d758dc-8ec4-4f1a-b522-c14e70716b31/beethoven_sonata_16_imslp.pdfIn PDF document text
    • http://zepadatoju.pbworks.com/w/file/fetch/144415191/fuxabekosoli.pdfIn PDF document text
    • http://xojifot.pbworks.com/f/gcf_and_lcm_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4004ed2a-0c60-43d9-879c-b9a5e516f1ba/time_management_tips_for_working_parents.pdfIn PDF document text
    • http://xojipoxar.pbworks.com/f/99834946938.pdfIn PDF document text
    • http://negovijalulu.pbworks.com/f/pupovovilugemubusol.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/umuc_ifsm_201_excel_project_1_rental_cars.pdfIn PDF document text
    • http://lugozamuxika.pbworks.com/w/file/fetch/144418173/yds_publishing_deneme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0f0dbc-f8f2-40f0-818e-bb85a46ffd30/globalization_and_culture_john_tomlinson.pdfIn PDF document text
    • http://niwomif.pbworks.com/f/laudate_dominum_piano_solo_sheet_music.pdfIn PDF document text
    • http://funinupun.pbworks.com/f/40883153624.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e583f837-5e1a-4c14-8f10-8c93d5ff0418/the_hobbit_tamil_dubbed_movie_free_download_tamilrockers.pdfIn PDF document text
    • http://bemulopawed.pbworks.com/f/54651884924.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8A 4980 bytes
SHA-256: 90024971d495b3454f66fe6d1cc5d71de05179bbd604ef349030100c4fa02a5f
font_01_sfnt_off00010b83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B83 13096 bytes
SHA-256: fe837e1e28ac9d9959cdd992f8c0b35623653ce3043b82daa8e7c052474b54c9
font_02_sfnt_off00013588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13588 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34