Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6af073e2ef9319d…

MALICIOUS

PDF

77.9 KB Created: 2021-04-08 04:54:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 0af06c8559f034adf658b075c8c47673 SHA-1: 8bc78428901e7ed669dd99f0e993bbe03bd716c7 SHA-256: b6af073e2ef9319de7ba88c1c9c92f053ded7ec90a25d1807725b67b8975b94b
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The embedded URI points to a suspicious domain, likely for phishing purposes. The PDF structure and embedded content suggest it's part of a phishing campaign, potentially using social engineering to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/123?utm_term=blackberry+message+tone+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367294/normal_601d502237214.pdfIn PDF document text
    • http://bikelumonekodex.mygamesonline.org/zefaparudiruxib.pdfIn PDF document text
    • http://jaxixojuko.mypressonline.com/pdf_splitter_and_merger_free_download_filehippo.pdfIn PDF document text
    • http://xubanapirobula.mypressonline.com/solucion_isotonica_definicion.pdfIn PDF document text
    • http://zisuroto.mygamesonline.org/acheulean_industry.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413986/normal_6051736bee273.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/26b98f5a-952e-483e-9354-8b5ebd794bab/best_convertible_car_seat_safety_ratings.pdfIn PDF document text
    • http://famekuputoda.myartsonline.com/oxford_bookworms_download_free.pdfIn PDF document text
    • http://jumawivowibeb.onlinewebshop.net/dofomozinimulusupa.pdfIn PDF document text
    • http://magikid.epizy.com/80545808381.pdfIn PDF document text
    • http://sexupoweduf.epizy.com/anatomy_regional_terms_worksheet.pdfIn PDF document text
    • http://depewogidi.rf.gd/94111409851.pdfIn PDF document text
    • http://wuwedilejom.myartsonline.com/personal_branding.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d642d7-6466-4ab8-bab0-9701636c260b/nenuwebatuzovabig.pdfIn PDF document text
    • http://digasima.rf.gd/549673150.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7004ab3-6828-466b-8f40-9f8ca72e0445/bawobufuxuvoseno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce58b9e8-b4fd-44e1-a046-9e883e4b0081/wonoruponalebuvixawol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2181eb2-fa20-4781-be63-f93af2270a04/what_does_nolo_mean_in_english.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/141cdf9f-3b45-4738-864c-d66835ceec3c/12_tenses_in_english_grammar_in_urdu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26e28e24-a1db-4dc6-aa7b-a1cf2f386e51/rifodojoferezide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/348f46d5-ccb2-4fe3-81d0-e1989657e673/excel_vba_range_object_variable.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_off0000e86c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86C 2960 bytes
SHA-256: 3a99bfcc8a6322cb1f5d9dd0c76c95525b0630114fc12c53a342d41e6b6e0e01
font_01_sfnt_off0000f2dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2DC 5556 bytes
SHA-256: 0743dbdcaab08cf15267679b7b01cf62e0e89307e445d288974e8dc7189d431e
font_02_sfnt_off000105c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C2 10540 bytes
SHA-256: 2b81463aeb7626c1414462e1327d66a4dfdef45c5c6b4fb6af2d27afc8249d79