Malicious PDF — malware analysis report

Static analysis result for SHA-256 44cd3431c8be65ad…

MALICIOUS

PDF

70.5 KB Created: 2021-04-03 19:08:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d24a04cfe6771c2050ed9373e828d4df SHA-1: 8ca3134c85a1298aac19a692841c08483cc1118b SHA-256: 44cd3431c8be65ada9f741268d9ec265d9fecbcdbdda9ab4704da813ec63becb
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains embedded URLs and is flagged by ML classifiers as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, suggesting a spam or phishing operation. The primary malicious URL identified is https://jacksth.ru/123, which is likely used to host or redirect to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://jacksth.ru/123?utm_term=arthana+binu+wallpaper PDF link annotation
    • http://zanapipok.getenjoyment.net/zilapufululilav.pdfIn PDF document text
    • http://benilobodereji.mygamesonline.org/xozasizuzosomukopilimu.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/e16a5367-a275-4508-85f7-ed6261f493fc/keystone_kstad70b_dehumidifier_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/15deb39f-300f-495f-8561-f0f6188c01ad/you_before_me_netflix.pdfIn PDF document text
    • http://joriboka.epizy.com/zamuwifovutivamota.pdfIn PDF document text
    • http://gemuviwir.rf.gd/red_cross_lifeguard_cpr_test_answers.pdfIn PDF document text
    • http://zuvuzevo.atwebpages.com/b_com_books_in_gujarati_medium.pdfIn PDF document text
    • https://1cd0d4d5-11d4-440c-a307-81f73801f601.filesusr.com/ugd/f0e51d_fa1c190186ac4e03872fb75abb4d8f04.pdf?index=trueIn PDF document text
    • http://kusogit.rf.gd/gakulomigum.pdfIn PDF document text
    • https://bed2724e-b6a4-42c6-a365-5b2dc6a82e2f.filesusr.com/ugd/9f087b_1dc27de1115b434e86736c7e1d5d952d.pdf?index=trueIn PDF document text
    • http://forawoxo.epizy.com/54227946986.pdfIn PDF document text
    • http://ratobewiwigu.atwebpages.com/after_death_comic.pdfIn PDF document text
    • https://eac5c218-d238-408c-98a6-8ff0ecbb25fc.filesusr.com/ugd/b1277d_e11a53bb323f49aba8a35cd41bb86e6a.pdf?index=trueIn PDF document text
    • http://nobapizasiwe.myartsonline.com/limit_test_for_arsenic.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da4cacb1-1e88-4738-8942-6e8735696124/how_to_program_ge_universal_remote_to_westinghouse_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d39d4e2-3a3c-47d3-9132-531c1ec5d3f6/75079454443.pdfIn PDF document text
    • https://3d636ecf-b5c4-4691-845c-2d501a7a8090.filesusr.com/ugd/b09df1_1809486f9b59419fb50f2d3d388f8e0e.pdf?index=trueIn PDF document text
    • http://ravigokabuf.rf.gd/the_maze_runner_scorch_trials_full_movie_download_in_hindi_480p.pdfIn PDF document text
    • http://guriseb.myartsonline.com/aws_developer_certification_dumps_free.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_off0000d843.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD843 4948 bytes
SHA-256: f32f74c729ee23ae01ad0fbd9125a2657478df63816fac2cceefeb57b903ee37
font_01_sfnt_off0000e91e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE91E 10604 bytes
SHA-256: 9b33fbdaf6a3d7cb9930b97124600dc348fe3bc639556f1fbde7ef8ee69e3cc7

Open this report in the interactive analyzer, or submit your own file for analysis.