Malicious PDF — malware analysis report

Static analysis result for SHA-256 471111731a394e1f…

MALICIOUS

PDF

83.5 KB Created: 2021-03-26 07:51:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 50592ab6d04f67167eae5e376a22162e SHA-1: 218e863aa44748de9b5c808fe5fc744ea8b900b6 SHA-256: 471111731a394e1f0b2bcb7916968abc00f51bba7eeec2f41848a92a0dc1d7ed
186 Risk Score

Malware Insights

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

This PDF file is classified as malicious by ML and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO poisoning tactic to direct users to malicious content. The document body, though heavily obfuscated, appears to contain keywords related to search queries, reinforcing the lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://kuzutuzo.ru/wix?keyword=white+pages+charlottesville+va PDF link annotation
    • http://noxezef.iblogger.org/berotebufatarumunires.pdfIn PDF document text
    • http://laribij.scienceontheweb.net/34450770071.pdfIn PDF document text
    • http://loxiturizule.sportsontheweb.net/tesemibefifatumemu.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/the_painted_bird_film_buy.pdfIn PDF document text
    • http://derifupiwa.mypressonline.com/jubawezefexivewezipo.pdfIn PDF document text
    • http://nuloriwilorij.scienceontheweb.net/beginner_strength_training_program_reddit.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/130f756d-fac7-4347-9ec3-88118e745d91/5796816331.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43323b77-99c7-4551-8b3d-2015ba6a2be4/you_can_be_a_stock_market_genius_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5f909789-f12a-4cf7-8506-9654803873f3/61551790910.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fb1f5c0-e7d2-4931-a005-6e7fd27099a1/togeruzovexavolugosato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0b47e1e8-2e29-4fdf-ae2b-3528aaed4f1b/procreate_pocket_portrait_tutorial.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79316a59-d232-4098-819d-5f6c1ad2910a/lg_truesteam_washer_error_codes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2307415e-e3f8-4840-ac33-a86f5915dd6c/top_notch_fundamentals_b_final_exam.pdfIn PDF document text
    • http://bitines.myartsonline.com/19557698084.pdfIn PDF document text
    • https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_fa29573ab035463cb7c1d48cbc54b1a0.pdf?index=trueIn PDF document text
    • https://71a0d42b-91d5-4e94-9338-ff69ca8a624b.filesusr.com/ugd/e5d5e5_d6516449135745049724516e9d0c0eee.pdf?index=trueIn PDF document text
    • https://521a9f5b-5c7e-4f25-a9e4-5446fb1b1975.filesusr.com/ugd/c1a494_565b80bf5fad4b3faba0fd366375c09d.pdf?index=trueIn PDF document text
    • https://e0fa0743-814d-41de-b6a5-47f787911882.filesusr.com/ugd/89d2ef_72a2abdc999548bb8e881a57b3a82595.pdf?index=trueIn PDF document text
    • http://penisidisipifo.rf.gd/libro_de_cardiologia_guadalajara_descargar_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90cb9c3f-a6e8-4853-a883-f4798136780d/what_happens_in_the_distilling_process.pdfIn PDF document text
    • http://tobikinos.onlinewebshop.net/23388703993.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5df50204-2f6e-4480-8bf4-b2d933772f3f/71743842506.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9980b997-f512-4bbd-9ce6-230d2dd51b9d/super_systems_clean_plus.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_off00010907.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10907 5268 bytes
SHA-256: 1a97cc05a315cee083ce49a8e55fa2373b639289cea3d6239050c2f754d186e6
font_01_sfnt_off00011b00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B00 11064 bytes
SHA-256: 5784eb5d8f40265433eac5544b70e2e85715d617edd6fbae55752f260a72cbcd

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