Malicious PDF — malware analysis report

Static analysis result for SHA-256 7005ebdf4bd7f12b…

MALICIOUS

PDF

171.7 KB Created: 2021-04-19 02:56:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 55d883278e17482d2cb386878a25460a SHA-1: ba1821c0581bf4bbb7d679247ad798d30be4dd3f SHA-256: 7005ebdf4bd7f12bae988eeacca5e22d47bb1afabe0d3c6ed4b23f371fe2e293
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable hosting, and is flagged by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly indicates maliciousness. The primary malicious URL identified is https://druttle.ru/strik?utm_term=las+flores+del+mal+poemas+de+amor, which is likely used to redirect the user to a malicious site. No scripts were extracted, but the overall structure and URL distribution suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://druttle.ru/strik?utm_term=las+flores+del+mal+poemas+de+amor PDF link annotation
    • https://cdn.sqhk.co/lamiwifa/bjdjibV/69202326683.pdfIn PDF document text
    • https://cdn.sqhk.co/lewonuvaxu/TB6ihhc/civil_war_sites_franklin_tennessee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488330/normal_6005bbd71c923.pdfIn PDF document text
    • https://cdn.sqhk.co/mojupesonon/jjBjhjy/gozekajovamutedezomu.pdfIn PDF document text
    • https://cdn.sqhk.co/gujowaxexag/ODxPMja/peliruzib.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/hbigthf/human_resource_management_certificate_worth_it.pdfIn PDF document text
    • https://cdn.sqhk.co/dejijadu/bgghhhe/xovax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425492/normal_5fd3777a597a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454041/normal_600fda0f43c0e.pdfIn PDF document text
    • https://cdn.sqhk.co/fasisela/iqhdSbk/word_connect_answers_level_500.pdfIn PDF document text
    • https://cdn.sqhk.co/vozevadijut/hjHiaOl/fortnite_gun_sounds_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383806/normal_60095b08acdcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383300/normal_606e0cf49173e.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/f3580fa4-98c4-4922-ba60-b3239874ab0c/tafheem_ul_quran_english_online.pdfIn PDF document text
    • https://7835c217-6b95-46a1-915a-76cdebae3fe0.filesusr.com/ugd/debfb4_c6f9e881184d40f6b3b710fa35943e91.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vanatul/wivinegiginidinux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aba735d2-a47f-41ff-98a3-35e038178c13/gozinoduvunimigu.pdfIn PDF document text
    • https://8b1d1a20-f0f3-43d5-aeb5-704ac988d6c7.filesusr.com/ugd/9dbc1d_3795f3aa84aa4cd1991964dc917f9b5e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xulepiwa/grid_template_css_w3schools.pdfIn PDF document text
    • https://f4a80ce2-0a24-44e2-aff7-13c87a434ee9.filesusr.com/ugd/ace063_c32ad218e7b44cd696d8b2e3ee8125ce.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb7807cc-6266-4263-969a-73e4c3f5f3a3/46597534495.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cec97f44-6eb3-420d-9727-66baf9bd97c5/gaggia_classic_coffee_machine_instructions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae70e8c6-02d1-4f6f-a05c-5aefdd5271e0/genero_literario_del_caballero_de_la_armadura_oxidada.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00024aa0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24AA0 2676 bytes
SHA-256: 83acb573974db8d912ccedf9a2f0446e4247e0dfa4bae2df5eda92efa3fdd434
font_01_sfnt_off000254d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x254D1 4680 bytes
SHA-256: 1db08267d34d492a94772fbc9731e01da998d8edb92d5743579672df469cce96
font_02_sfnt_off000264b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x264B5 13788 bytes
SHA-256: efeb77a121c18e5ccb911987a098e01bc7e4c9d472bcdd3999d9ed46230ce9d2
font_03_sfnt_off00028fe3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28FE3 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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