Malicious PDF — malware analysis report

Static analysis result for SHA-256 35d0a5b950ee3971…

MALICIOUS

PDF

91.3 KB Created: 2021-03-22 05:48:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 054164fbce70c8ef4f1bead0600392bf SHA-1: af138046b6e337587fa124b05b89545f4246230b SHA-256: 35d0a5b950ee397106b1d77b5cb4ddd1f302f3ed4717b5441e9ac00419aa059d
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt.

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://ponafet.ru/123?utm_term=bollywood+movie+guru+2007 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418987/normal_5fccf974231ee.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/57635903113.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489032/normal_5fcd6bd5f0e5c.pdfIn PDF document text
    • http://vadanunagirira.getenjoyment.net/53926714819.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502178/normal_6057f13848986.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/who_does_mollie_symbolize_in_animal_farm.pdfIn PDF document text
    • http://zopokujejisolan.getenjoyment.net/masiwisaxizowisawav.pdfIn PDF document text
    • http://finomimetafix.sportsontheweb.net/vatican_city_tourist_map.pdfIn PDF document text
    • http://mudixefibewab.mywebcommunity.org/cinderella_solution_free.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
    • https://uploads.strikinglycdn.com/files/174f1d7a-ba8e-4964-8369-e8105d0746f1/how_to_repair_ekornes_stressless_recliner.pdfIn PDF document text
    • https://8b2103c5-345b-48fd-98e3-f19c90c4efd0.filesusr.com/ugd/0e2875_9d2c73e4bee64bc2aef13eb232aea508.pdf?index=trueIn PDF document text
    • https://fb075467-9d00-46c6-93ac-2b777f5e584b.filesusr.com/ugd/8bcd66_df74f01f6f3948f58e8b0f54ba058807.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dc253a2-92bc-47a7-bfa4-71ab8a2cdcaa/71455495670.pdfIn PDF document text
    • http://libiwozurogufo.rf.gd/android_8._0_root_no_pc.pdfIn PDF document text
    • http://vupikefugogulup.epizy.com/16562866789.pdfIn PDF document text
    • http://gerinidud.epizy.com/65473408788.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34594a77-b764-429f-93e5-cbe7a47818d8/wolisugurewemalejas.pdfIn PDF document text
    • http://valebuwevunav.epizy.com/antenna_theory_analysis_and_design_4th_edition.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001032f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 5112 bytes
SHA-256: 1e02785545e9bacec0df24360779a4d06cf333b5d5646166c6a9a8e91a637838
font_01_sfnt_off000114af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AF 11596 bytes
SHA-256: 17a0908aef117d459c6fd65dc4f105108b57c5a75fa6756a5cd89084f91c0c22
font_02_sfnt_off00013c6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C6D 16164 bytes
SHA-256: c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e
font_03_sfnt_off00015182.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15182 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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