Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0efaf9182dc4a79…

MALICIOUS

PDF

90.6 KB Created: 2021-03-23 12:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 722b9ab3ca5d355167bd3a8456d4a3f1 SHA-1: 21083c829ef50069a71c655b1a82f26b076d64e4 SHA-256: f0efaf9182dc4a79b4c70ae2a7382b3a39b1d7a5966f8e0bef70d3a0e53c6f1c
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a link farm on disposable hosting. The embedded URLs and the document body, which appears to be a garbled attempt to present content about communication, suggest a phishing or malware distribution lure. The primary malicious URL is https://soxebez.ru/strik.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://soxebez.ru/strik?utm_term=7+tipos+de+comunicacion+masiva+y+sus+caracteristicas PDF link annotation
    • http://fajikiviwakux.22web.org/history_alive_the_ancient_world_free_online_textbook.pdfIn PDF document text
    • http://wuxixezigitezir.mygamesonline.org/advantages_and_disadvantages_of_case_study_method_of_teaching.pdfIn PDF document text
    • http://jiwabozaxexe.mypressonline.com/likifuxulizokevateluf.pdfIn PDF document text
    • http://mamafiposorugul.sportsontheweb.net/xusoru.pdfIn PDF document text
    • http://jirekakeduvinij.22web.org/gopinoboje.pdfIn PDF document text
    • http://sugameloxufe.mywebcommunity.org/esclerosis_multiple_recurrente_remitente.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://soxomidil.epizy.com/possessive_adjectives_worksheets.pdfIn PDF document text
    • http://duzatip.rf.gd/bca_admission_form_2018_in_du.pdfIn PDF document text
    • http://bajofot.epizy.com/gijirarepomubi.pdfIn PDF document text
    • http://jodekiwob.rf.gd/applied_calculus_problem_solver.pdfIn PDF document text
    • http://xujerowuwabet.epizy.com/what_is_at_the_end_of_the_road_to_hana.pdfIn PDF document text
    • http://lazuvubiwom.epizy.com/jujodeguva.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/union_plumbing_las_vegas_nevada.pdfIn PDF document text
    • https://s3.amazonaws.com/takurugilij/esmo_treatment_guidelines_rcc.pdfIn PDF document text
    • http://fibifogusezax.rf.gd/92520932253.pdfIn PDF document text
    • http://sogefotatuledis.epizy.com/25343515180.pdfIn PDF document text
    • http://lunufisisosixi.rf.gd/zeturejakakedufopi.pdfIn PDF document text
    • http://lofupiwosilabo.epizy.com/amharic_music_lyrics.pdfIn PDF document text
    • https://38f9ccf9-db33-4582-994d-0ea518e52d38.filesusr.com/ugd/368de4_dcd101f47f164e2884106633fe6f05f0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dapekufoxiraku/gadogoxejawuwisuwinoloxe.pdfIn PDF document text
    • https://7c5e2310-e79b-429e-9f4a-70471a43dcce.filesusr.com/ugd/8ec1ef_cdb4c708911043749dee78de0e933b50.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/roxawo/bestwap_in_song_2019_mp4.pdfIn PDF document text
    • http://poluwusafoge.epizy.com/berumodubebiwen.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/xotegugagojudaru.pdfIn PDF document text
    • http://pekafujojef.onlinewebshop.net/singer_touch_and_sew_special_zig_zag_model_648_manual.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_off00011284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11284 5216 bytes
SHA-256: f542c7e9d44a39113a0b4e54a9c911b0269cc1f87727c2a604a939a9900bae68
font_01_sfnt_off00012430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12430 12356 bytes
SHA-256: 7b749461b57bca814b19c13bf4063e2a5e8a5371fa00d124f3d837f3d9f91434
font_02_sfnt_off00014bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14BFD 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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